Merge remote-tracking branch 'origin/master'

33 files changed, 1818 insertions, 2408 deletions

diff --git a/simulation/QAM_Fading/BPSK_2021-11-10_15-49-16.png b/doc/thesis/figures/screenshots/BPSK_2021-11-10_15-49-16.png
index 6ae117d..6ae117d 100644
--- a/simulation/QAM_Fading/BPSK_2021-11-10_15-49-16.png
+++ b/doc/thesis/figures/screenshots/BPSK_2021-11-10_15-49-16.png
diff --git a/simulation/QAM/QAM16_Simulation.png b/doc/thesis/figures/screenshots/QAM16_Simulation.png
index 1342db4..1342db4 100644
--- a/simulation/QAM/QAM16_Simulation.png
+++ b/doc/thesis/figures/screenshots/QAM16_Simulation.png
diff --git a/hardware/QAM/QPSK_Hardware.png b/doc/thesis/figures/screenshots/QPSK_Hardware.png
index 062d95e..062d95e 100644
--- a/hardware/QAM/QPSK_Hardware.png
+++ b/doc/thesis/figures/screenshots/QPSK_Hardware.png
diff --git a/simulation/QPSK/qpsk_nogui.pdf b/doc/thesis/figures/screenshots/qpsk_nogui.pdf
index 0b0077e..0b0077e 100644
--- a/simulation/QPSK/qpsk_nogui.pdf
+++ b/doc/thesis/figures/screenshots/qpsk_nogui.pdf
diff --git a/hardware/QAM/qam.grc b/hardware/QAM/qam.grc
index 4c53ba6..e14f1fe 100644
--- a/hardware/QAM/qam.grc
+++ b/hardware/QAM/qam.grc
@@ -42,7 +42,7 @@ blocks:
     rot_sym: '4'
     soft_dec_lut: None
     sym_map: '[0, 1, 3, 2]'
-    type: bpsk
+    type: 16qam
   states:
     bus_sink: false
     bus_source: false
diff --git a/hardware/QAM/qpks.py b/hardware/QAM/qpks.py
deleted file mode 100755
index f89ac12..0000000
--- a/hardware/QAM/qpks.py
+++ /dev/null
@@ -1,1001 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-#
-# SPDX-License-Identifier: GPL-3.0
-#
-# GNU Radio Python Flow Graph
-# Title: QPSK Hardware Simultion
-# Author: Pross Naoki, Halter Sara Cinzia
-# GNU Radio version: 3.8.2.0
-
-from distutils.version import StrictVersion
-
-if __name__ == '__main__':
-    import ctypes
-    import sys
-    if sys.platform.startswith('linux'):
-        try:
-            x11 = ctypes.cdll.LoadLibrary('libX11.so')
-            x11.XInitThreads()
-        except:
-            print("Warning: failed to XInitThreads()")
-
-from PyQt5 import Qt
-from gnuradio import qtgui
-from gnuradio.filter import firdes
-import sip
-from gnuradio import blocks
-import pmt
-from gnuradio import digital
-from gnuradio import gr
-import sys
-import signal
-from argparse import ArgumentParser
-from gnuradio.eng_arg import eng_float, intx
-from gnuradio import eng_notation
-from gnuradio import uhd
-import time
-from gnuradio.qtgui import Range, RangeWidget
-
-from gnuradio import qtgui
-
-class qpks(gr.top_block, Qt.QWidget):
-
-    def __init__(self):
-        gr.top_block.__init__(self, "QPSK Hardware Simultion")
-        Qt.QWidget.__init__(self)
-        self.setWindowTitle("QPSK Hardware Simultion")
-        qtgui.util.check_set_qss()
-        try:
-            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
-        except:
-            pass
-        self.top_scroll_layout = Qt.QVBoxLayout()
-        self.setLayout(self.top_scroll_layout)
-        self.top_scroll = Qt.QScrollArea()
-        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
-        self.top_scroll_layout.addWidget(self.top_scroll)
-        self.top_scroll.setWidgetResizable(True)
-        self.top_widget = Qt.QWidget()
-        self.top_scroll.setWidget(self.top_widget)
-        self.top_layout = Qt.QVBoxLayout(self.top_widget)
-        self.top_grid_layout = Qt.QGridLayout()
-        self.top_layout.addLayout(self.top_grid_layout)
-
-        self.settings = Qt.QSettings("GNU Radio", "qpks")
-
-        try:
-            if StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
-                self.restoreGeometry(self.settings.value("geometry").toByteArray())
-            else:
-                self.restoreGeometry(self.settings.value("geometry"))
-        except:
-            pass
-
-        ##################################################
-        # Variables
-        ##################################################
-        self.sps = sps = 4
-        self.nfilts = nfilts = 32
-        self.excess_bw = excess_bw = .35
-        self.timing_loop_bw = timing_loop_bw = 2 * 3.141592653589793 / 100
-        self.samp_rate = samp_rate = .4e6
-        self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
-        self.qpsk_const = qpsk_const = digital.constellation_rect([0.707+0.707j, -0.707+0.707j, -0.707-0.707j, 0.707-0.707j], [0, 1, 3, 2],
-        4, 2, 2, 1, 1).base()
-        self.phase_bw = phase_bw = 2 * 3.141592653589793 / 100
-        self.eq_ntaps = eq_ntaps = 15
-        self.eq_mod = eq_mod = 2
-        self.eq_gain = eq_gain = .01
-
-        ##################################################
-        # Blocks
-        ##################################################
-        self.params = Qt.QTabWidget()
-        self.params_widget_0 = Qt.QWidget()
-        self.params_layout_0 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.params_widget_0)
-        self.params_grid_layout_0 = Qt.QGridLayout()
-        self.params_layout_0.addLayout(self.params_grid_layout_0)
-        self.params.addTab(self.params_widget_0, 'Channel')
-        self.params_widget_1 = Qt.QWidget()
-        self.params_layout_1 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.params_widget_1)
-        self.params_grid_layout_1 = Qt.QGridLayout()
-        self.params_layout_1.addLayout(self.params_grid_layout_1)
-        self.params.addTab(self.params_widget_1, 'Receiver')
-        self.top_grid_layout.addWidget(self.params)
-        self.plots = Qt.QTabWidget()
-        self.plots_widget_0 = Qt.QWidget()
-        self.plots_layout_0 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_0)
-        self.plots_grid_layout_0 = Qt.QGridLayout()
-        self.plots_layout_0.addLayout(self.plots_grid_layout_0)
-        self.plots.addTab(self.plots_widget_0, 'Constellations')
-        self.plots_widget_1 = Qt.QWidget()
-        self.plots_layout_1 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_1)
-        self.plots_grid_layout_1 = Qt.QGridLayout()
-        self.plots_layout_1.addLayout(self.plots_grid_layout_1)
-        self.plots.addTab(self.plots_widget_1, 'Frequency')
-        self.plots_widget_2 = Qt.QWidget()
-        self.plots_layout_2 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_2)
-        self.plots_grid_layout_2 = Qt.QGridLayout()
-        self.plots_layout_2.addLayout(self.plots_grid_layout_2)
-        self.plots.addTab(self.plots_widget_2, 'Time')
-        self.plots_widget_3 = Qt.QWidget()
-        self.plots_layout_3 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_3)
-        self.plots_grid_layout_3 = Qt.QGridLayout()
-        self.plots_layout_3.addLayout(self.plots_grid_layout_3)
-        self.plots.addTab(self.plots_widget_3, 'Bits')
-        self.top_grid_layout.addWidget(self.plots)
-        self._phase_bw_range = Range(0, 1, .01, 2 * 3.141592653589793 / 100, 200)
-        self._phase_bw_win = RangeWidget(self._phase_bw_range, self.set_phase_bw, 'Phase Bandwidth', "counter_slider", float)
-        self.params_grid_layout_1.addWidget(self._phase_bw_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.params_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_1.setColumnStretch(c, 1)
-        self._eq_gain_range = Range(0, .1, .001, .01, 200)
-        self._eq_gain_win = RangeWidget(self._eq_gain_range, self.set_eq_gain, 'Equalizer Rate', "counter_slider", float)
-        self.params_grid_layout_1.addWidget(self._eq_gain_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.params_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_1.setColumnStretch(c, 1)
-        self.uhd_usrp_source_0 = uhd.usrp_source(
-            ",".join(("serial=309AF6A  ", "")),
-            uhd.stream_args(
-                cpu_format="fc32",
-                args='',
-                channels=list(range(0,1)),
-            ),
-        )
-        self.uhd_usrp_source_0.set_clock_source('external', 0)
-        self.uhd_usrp_source_0.set_center_freq(2.4e9, 0)
-        self.uhd_usrp_source_0.set_rx_agc(False, 0)
-        self.uhd_usrp_source_0.set_normalized_gain(0.6, 0)
-        self.uhd_usrp_source_0.set_antenna('RX2', 0)
-        self.uhd_usrp_source_0.set_samp_rate(samp_rate)
-        self.uhd_usrp_source_0.set_time_unknown_pps(uhd.time_spec())
-        self.uhd_usrp_sink_0 = uhd.usrp_sink(
-            ",".join(("serial=309AF59  ", "")),
-            uhd.stream_args(
-                cpu_format="fc32",
-                args='',
-                channels=list(range(0,1)),
-            ),
-            '',
-        )
-        self.uhd_usrp_sink_0.set_clock_source('external', 0)
-        self.uhd_usrp_sink_0.set_center_freq(2.4e9, 0)
-        self.uhd_usrp_sink_0.set_normalized_gain(0.35, 0)
-        self.uhd_usrp_sink_0.set_antenna('TX/RX', 0)
-        self.uhd_usrp_sink_0.set_samp_rate(samp_rate)
-        self.uhd_usrp_sink_0.set_time_unknown_pps(uhd.time_spec())
-        self.qtgui_time_sink_x_2_0_0 = qtgui.time_sink_c(
-            1024, #size
-            samp_rate, #samp_rate
-            "Received (RX)", #name
-            1 #number of inputs
-        )
-        self.qtgui_time_sink_x_2_0_0.set_update_time(0.10)
-        self.qtgui_time_sink_x_2_0_0.set_y_axis(-1, 1)
-
-        self.qtgui_time_sink_x_2_0_0.set_y_label('Amplitude', "")
-
-        self.qtgui_time_sink_x_2_0_0.enable_tags(False)
-        self.qtgui_time_sink_x_2_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_time_sink_x_2_0_0.enable_autoscale(True)
-        self.qtgui_time_sink_x_2_0_0.enable_grid(False)
-        self.qtgui_time_sink_x_2_0_0.enable_axis_labels(True)
-        self.qtgui_time_sink_x_2_0_0.enable_control_panel(False)
-        self.qtgui_time_sink_x_2_0_0.enable_stem_plot(False)
-
-
-        labels = ['Signal 1', 'Signal 2', 'Signal 3', 'Signal 4', 'Signal 5',
-            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ['blue', 'red', 'green', 'black', 'cyan',
-            'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-        styles = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        markers = [-1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1]
-
-
-        for i in range(2):
-            if len(labels[i]) == 0:
-                if (i % 2 == 0):
-                    self.qtgui_time_sink_x_2_0_0.set_line_label(i, "Re{{Data {0}}}".format(i/2))
-                else:
-                    self.qtgui_time_sink_x_2_0_0.set_line_label(i, "Im{{Data {0}}}".format(i/2))
-            else:
-                self.qtgui_time_sink_x_2_0_0.set_line_label(i, labels[i])
-            self.qtgui_time_sink_x_2_0_0.set_line_width(i, widths[i])
-            self.qtgui_time_sink_x_2_0_0.set_line_color(i, colors[i])
-            self.qtgui_time_sink_x_2_0_0.set_line_style(i, styles[i])
-            self.qtgui_time_sink_x_2_0_0.set_line_marker(i, markers[i])
-            self.qtgui_time_sink_x_2_0_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_time_sink_x_2_0_0_win = sip.wrapinstance(self.qtgui_time_sink_x_2_0_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_2.addWidget(self._qtgui_time_sink_x_2_0_0_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_2.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_2.setColumnStretch(c, 1)
-        self.qtgui_time_sink_x_2 = qtgui.time_sink_c(
-            1024, #size
-            samp_rate, #samp_rate
-            "Modulated (TX)", #name
-            1 #number of inputs
-        )
-        self.qtgui_time_sink_x_2.set_update_time(0.10)
-        self.qtgui_time_sink_x_2.set_y_axis(-1, 1)
-
-        self.qtgui_time_sink_x_2.set_y_label('Amplitude', "")
-
-        self.qtgui_time_sink_x_2.enable_tags(False)
-        self.qtgui_time_sink_x_2.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_time_sink_x_2.enable_autoscale(True)
-        self.qtgui_time_sink_x_2.enable_grid(False)
-        self.qtgui_time_sink_x_2.enable_axis_labels(True)
-        self.qtgui_time_sink_x_2.enable_control_panel(False)
-        self.qtgui_time_sink_x_2.enable_stem_plot(False)
-
-
-        labels = ['Signal 1', 'Signal 2', 'Signal 3', 'Signal 4', 'Signal 5',
-            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ['blue', 'red', 'green', 'black', 'cyan',
-            'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-        styles = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        markers = [-1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1]
-
-
-        for i in range(2):
-            if len(labels[i]) == 0:
-                if (i % 2 == 0):
-                    self.qtgui_time_sink_x_2.set_line_label(i, "Re{{Data {0}}}".format(i/2))
-                else:
-                    self.qtgui_time_sink_x_2.set_line_label(i, "Im{{Data {0}}}".format(i/2))
-            else:
-                self.qtgui_time_sink_x_2.set_line_label(i, labels[i])
-            self.qtgui_time_sink_x_2.set_line_width(i, widths[i])
-            self.qtgui_time_sink_x_2.set_line_color(i, colors[i])
-            self.qtgui_time_sink_x_2.set_line_style(i, styles[i])
-            self.qtgui_time_sink_x_2.set_line_marker(i, markers[i])
-            self.qtgui_time_sink_x_2.set_line_alpha(i, alphas[i])
-
-        self._qtgui_time_sink_x_2_win = sip.wrapinstance(self.qtgui_time_sink_x_2.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_2.addWidget(self._qtgui_time_sink_x_2_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_2.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_2.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_1_0_1_0 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Locked", #name
-            1
-        )
-        self.qtgui_freq_sink_x_1_0_1_0.set_update_time(0.10)
-        self.qtgui_freq_sink_x_1_0_1_0.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_1_0_1_0.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_1_0_1_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_1_0_1_0.enable_autoscale(False)
-        self.qtgui_freq_sink_x_1_0_1_0.enable_grid(False)
-        self.qtgui_freq_sink_x_1_0_1_0.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_1_0_1_0.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_1_0_1_0.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_1_0_1_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_1_0_1_0.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_1_0_1_0.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_1_0_1_0.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_1_0_1_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_1_0_1_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_1_0_1_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_1_0_1_0_win, 1, 2, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(2, 3):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_1_0_1 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Equalized", #name
-            1
-        )
-        self.qtgui_freq_sink_x_1_0_1.set_update_time(0.10)
-        self.qtgui_freq_sink_x_1_0_1.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_1_0_1.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_1_0_1.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_1_0_1.enable_autoscale(False)
-        self.qtgui_freq_sink_x_1_0_1.enable_grid(False)
-        self.qtgui_freq_sink_x_1_0_1.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_1_0_1.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_1_0_1.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_1_0_1.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_1_0_1.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_1_0_1.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_1_0_1.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_1_0_1.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_1_0_1_win = sip.wrapinstance(self.qtgui_freq_sink_x_1_0_1.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_1_0_1_win, 1, 1, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_1_0_0 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Received", #name
-            1
-        )
-        self.qtgui_freq_sink_x_1_0_0.set_update_time(0.10)
-        self.qtgui_freq_sink_x_1_0_0.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_1_0_0.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_1_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_1_0_0.enable_autoscale(False)
-        self.qtgui_freq_sink_x_1_0_0.enable_grid(False)
-        self.qtgui_freq_sink_x_1_0_0.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_1_0_0.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_1_0_0.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_1_0_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_1_0_0.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_1_0_0.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_1_0_0.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_1_0_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_1_0_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_1_0_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_1_0_0_win, 0, 1, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_1_0 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Synchronized and filtered", #name
-            1
-        )
-        self.qtgui_freq_sink_x_1_0.set_update_time(0.10)
-        self.qtgui_freq_sink_x_1_0.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_1_0.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_1_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_1_0.enable_autoscale(False)
-        self.qtgui_freq_sink_x_1_0.enable_grid(False)
-        self.qtgui_freq_sink_x_1_0.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_1_0.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_1_0.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_1_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_1_0.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_1_0.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_1_0.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_1_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_1_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_1_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_1_0_win, 0, 2, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(2, 3):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_1 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Modulated (TX)", #name
-            1
-        )
-        self.qtgui_freq_sink_x_1.set_update_time(0.10)
-        self.qtgui_freq_sink_x_1.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_1.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_1.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_1.enable_autoscale(False)
-        self.qtgui_freq_sink_x_1.enable_grid(False)
-        self.qtgui_freq_sink_x_1.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_1.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_1.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_1.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_1.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_1.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_1.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_1.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_1_win = sip.wrapinstance(self.qtgui_freq_sink_x_1.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_1_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_eye_sink_x_1 = qtgui.eye_sink_c(
-            1024, #size
-            samp_rate, #samp_rate
-            "", #name
-            1 #number of inputs
-        )
-        self.qtgui_eye_sink_x_1.set_update_time(0.10)
-        self.qtgui_eye_sink_x_1.set_samp_per_symbol(sps)
-        self.qtgui_eye_sink_x_1.set_y_axis(-1, 1)
-
-        self.qtgui_eye_sink_x_1.set_y_label('Amplitude', "")
-
-        self.qtgui_eye_sink_x_1.enable_tags(True)
-        self.qtgui_eye_sink_x_1.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_eye_sink_x_1.enable_autoscale(False)
-        self.qtgui_eye_sink_x_1.enable_grid(False)
-        self.qtgui_eye_sink_x_1.enable_axis_labels(True)
-        self.qtgui_eye_sink_x_1.enable_control_panel(False)
-
-
-        labels = ['Signal 1', 'Signal 2', 'Signal 3', 'Signal 4', 'Signal 5',
-            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ['blue', 'blue', 'blue', 'blue', 'blue',
-            'blue', 'blue', 'blue', 'blue', 'blue']
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-        styles = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        markers = [-1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1]
-
-
-        for i in range(2):
-            if len(labels[i]) == 0:
-                if (i % 2 == 0):
-                    self.qtgui_eye_sink_x_1.set_line_label(i, "Eye [Re{{Data {0}}}]".format(round(i/2)))
-                else:
-                    self.qtgui_eye_sink_x_1.set_line_label(i, "Eye [Im{{Data {0}}}]".format(round((i-1)/2)))
-            else:
-                self.qtgui_eye_sink_x_1.set_line_label(i, labels[i])
-            self.qtgui_eye_sink_x_1.set_line_width(i, widths[i])
-            self.qtgui_eye_sink_x_1.set_line_color(i, colors[i])
-            self.qtgui_eye_sink_x_1.set_line_style(i, styles[i])
-            self.qtgui_eye_sink_x_1.set_line_marker(i, markers[i])
-            self.qtgui_eye_sink_x_1.set_line_alpha(i, alphas[i])
-
-        self._qtgui_eye_sink_x_1_win = sip.wrapinstance(self.qtgui_eye_sink_x_1.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_3.addWidget(self._qtgui_eye_sink_x_1_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_3.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_3.setColumnStretch(c, 1)
-        self.qtgui_eye_sink_x_0 = qtgui.eye_sink_c(
-            1024, #size
-            samp_rate, #samp_rate
-            "", #name
-            1 #number of inputs
-        )
-        self.qtgui_eye_sink_x_0.set_update_time(0.10)
-        self.qtgui_eye_sink_x_0.set_samp_per_symbol(sps)
-        self.qtgui_eye_sink_x_0.set_y_axis(-1, 1)
-
-        self.qtgui_eye_sink_x_0.set_y_label('Amplitude', "")
-
-        self.qtgui_eye_sink_x_0.enable_tags(True)
-        self.qtgui_eye_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_eye_sink_x_0.enable_autoscale(False)
-        self.qtgui_eye_sink_x_0.enable_grid(False)
-        self.qtgui_eye_sink_x_0.enable_axis_labels(True)
-        self.qtgui_eye_sink_x_0.enable_control_panel(False)
-
-
-        labels = ['Signal 1', 'Signal 2', 'Signal 3', 'Signal 4', 'Signal 5',
-            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ['blue', 'blue', 'blue', 'blue', 'blue',
-            'blue', 'blue', 'blue', 'blue', 'blue']
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-        styles = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        markers = [-1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1]
-
-
-        for i in range(2):
-            if len(labels[i]) == 0:
-                if (i % 2 == 0):
-                    self.qtgui_eye_sink_x_0.set_line_label(i, "Eye [Re{{Data {0}}}]".format(round(i/2)))
-                else:
-                    self.qtgui_eye_sink_x_0.set_line_label(i, "Eye [Im{{Data {0}}}]".format(round((i-1)/2)))
-            else:
-                self.qtgui_eye_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_eye_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_eye_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_eye_sink_x_0.set_line_style(i, styles[i])
-            self.qtgui_eye_sink_x_0.set_line_marker(i, markers[i])
-            self.qtgui_eye_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_eye_sink_x_0_win = sip.wrapinstance(self.qtgui_eye_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.top_grid_layout.addWidget(self._qtgui_eye_sink_x_0_win)
-        self.qtgui_const_sink_x_2 = qtgui.const_sink_c(
-            1024, #size
-            "Locked", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_2.set_update_time(0.10)
-        self.qtgui_const_sink_x_2.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_2.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_2.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_2.enable_autoscale(False)
-        self.qtgui_const_sink_x_2.enable_grid(False)
-        self.qtgui_const_sink_x_2.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_2.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_2.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_2.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_2.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_2.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_2.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_2.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_2_win = sip.wrapinstance(self.qtgui_const_sink_x_2.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_2_win, 1, 2, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(2, 3):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_1_0 = qtgui.const_sink_c(
-            1024, #size
-            "Equalized", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_1_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_1_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_1_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_1_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_1_0.enable_autoscale(False)
-        self.qtgui_const_sink_x_1_0.enable_grid(False)
-        self.qtgui_const_sink_x_1_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_1_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_1_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_1_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_1_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_1_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_1_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_1_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_1_0_win = sip.wrapinstance(self.qtgui_const_sink_x_1_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_1_0_win, 1, 1, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_0_0_0 = qtgui.const_sink_c(
-            2048, #size
-            "Received", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_0_0_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0_0_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0_0_0.enable_autoscale(True)
-        self.qtgui_const_sink_x_0_0_0.enable_grid(False)
-        self.qtgui_const_sink_x_0_0_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0_0_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0_0_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0_0_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0_0_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0_0_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0_0_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0_0_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_0_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0_0_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_0_0_0_win, 0, 1, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_0_0 = qtgui.const_sink_c(
-            2048, #size
-            "Synchronized and filtered", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_0_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0_0.enable_autoscale(True)
-        self.qtgui_const_sink_x_0_0.enable_grid(False)
-        self.qtgui_const_sink_x_0_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_0_0_win, 0, 2, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(2, 3):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_0 = qtgui.const_sink_c(
-            1024, #size
-            "Sent (with ISI)", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0.enable_autoscale(False)
-        self.qtgui_const_sink_x_0.enable_grid(False)
-        self.qtgui_const_sink_x_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_0_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, int(sps / 2))
-        self.digital_map_bb_0 = digital.map_bb([0, 1, 3, 2])
-        self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(4)
-        self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, 4, False)
-        self.digital_constellation_modulator_0 = digital.generic_mod(
-            constellation=qpsk_const,
-            differential=True,
-            samples_per_symbol=sps,
-            pre_diff_code=True,
-            excess_bw=excess_bw,
-            verbose=False,
-            log=False)
-        self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(qpsk_const)
-        self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(eq_ntaps, eq_mod, eq_gain, int(sps / 2))
-        self.blocks_null_sink_0 = blocks.null_sink(gr.sizeof_char*1)
-        self.blocks_file_source_0 = blocks.file_source(gr.sizeof_char*1, '/home/god/Documents/Fading/hardware/QPSK/lena512color.tiff', True, 0, 0)
-        self.blocks_file_source_0.set_begin_tag(pmt.PMT_NIL)
-
-
-
-        ##################################################
-        # Connections
-        ##################################################
-        self.connect((self.blocks_file_source_0, 0), (self.digital_constellation_modulator_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_costas_loop_cc_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.qtgui_const_sink_x_1_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.qtgui_freq_sink_x_1_0_1, 0))
-        self.connect((self.digital_constellation_decoder_cb_0, 0), (self.digital_diff_decoder_bb_0, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.qtgui_const_sink_x_0, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.qtgui_freq_sink_x_1, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.qtgui_time_sink_x_2, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.uhd_usrp_sink_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.digital_constellation_decoder_cb_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_const_sink_x_2, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_eye_sink_x_1, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_freq_sink_x_1_0_1_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_time_sink_x_2_0_0, 0))
-        self.connect((self.digital_diff_decoder_bb_0, 0), (self.digital_map_bb_0, 0))
-        self.connect((self.digital_map_bb_0, 0), (self.blocks_null_sink_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_const_sink_x_0_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_freq_sink_x_1_0, 0))
-        self.connect((self.uhd_usrp_source_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
-        self.connect((self.uhd_usrp_source_0, 0), (self.qtgui_const_sink_x_0_0_0, 0))
-        self.connect((self.uhd_usrp_source_0, 0), (self.qtgui_freq_sink_x_1_0_0, 0))
-
-
-    def closeEvent(self, event):
-        self.settings = Qt.QSettings("GNU Radio", "qpks")
-        self.settings.setValue("geometry", self.saveGeometry())
-        event.accept()
-
-    def get_sps(self):
-        return self.sps
-
-    def set_sps(self, sps):
-        self.sps = sps
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-        self.qtgui_eye_sink_x_0.set_samp_per_symbol(self.sps)
-        self.qtgui_eye_sink_x_1.set_samp_per_symbol(self.sps)
-
-    def get_nfilts(self):
-        return self.nfilts
-
-    def set_nfilts(self, nfilts):
-        self.nfilts = nfilts
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-
-    def get_excess_bw(self):
-        return self.excess_bw
-
-    def set_excess_bw(self, excess_bw):
-        self.excess_bw = excess_bw
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-
-    def get_timing_loop_bw(self):
-        return self.timing_loop_bw
-
-    def set_timing_loop_bw(self, timing_loop_bw):
-        self.timing_loop_bw = timing_loop_bw
-        self.digital_pfb_clock_sync_xxx_0.set_loop_bandwidth(self.timing_loop_bw)
-
-    def get_samp_rate(self):
-        return self.samp_rate
-
-    def set_samp_rate(self, samp_rate):
-        self.samp_rate = samp_rate
-        self.qtgui_eye_sink_x_0.set_samp_rate(self.samp_rate)
-        self.qtgui_eye_sink_x_1.set_samp_rate(self.samp_rate)
-        self.qtgui_freq_sink_x_1.set_frequency_range(0, self.samp_rate)
-        self.qtgui_freq_sink_x_1_0.set_frequency_range(0, self.samp_rate)
-        self.qtgui_freq_sink_x_1_0_0.set_frequency_range(0, self.samp_rate)
-        self.qtgui_freq_sink_x_1_0_1.set_frequency_range(0, self.samp_rate)
-        self.qtgui_freq_sink_x_1_0_1_0.set_frequency_range(0, self.samp_rate)
-        self.qtgui_time_sink_x_2.set_samp_rate(self.samp_rate)
-        self.qtgui_time_sink_x_2_0_0.set_samp_rate(self.samp_rate)
-        self.uhd_usrp_sink_0.set_samp_rate(self.samp_rate)
-        self.uhd_usrp_source_0.set_samp_rate(self.samp_rate)
-
-    def get_rrc_taps(self):
-        return self.rrc_taps
-
-    def set_rrc_taps(self, rrc_taps):
-        self.rrc_taps = rrc_taps
-        self.digital_pfb_clock_sync_xxx_0.update_taps(self.rrc_taps)
-
-    def get_qpsk_const(self):
-        return self.qpsk_const
-
-    def set_qpsk_const(self, qpsk_const):
-        self.qpsk_const = qpsk_const
-
-    def get_phase_bw(self):
-        return self.phase_bw
-
-    def set_phase_bw(self, phase_bw):
-        self.phase_bw = phase_bw
-        self.digital_costas_loop_cc_0.set_loop_bandwidth(self.phase_bw)
-
-    def get_eq_ntaps(self):
-        return self.eq_ntaps
-
-    def set_eq_ntaps(self, eq_ntaps):
-        self.eq_ntaps = eq_ntaps
-
-    def get_eq_mod(self):
-        return self.eq_mod
-
-    def set_eq_mod(self, eq_mod):
-        self.eq_mod = eq_mod
-        self.digital_cma_equalizer_cc_0.set_modulus(self.eq_mod)
-
-    def get_eq_gain(self):
-        return self.eq_gain
-
-    def set_eq_gain(self, eq_gain):
-        self.eq_gain = eq_gain
-        self.digital_cma_equalizer_cc_0.set_gain(self.eq_gain)
-
-
-
-
-
-def main(top_block_cls=qpks, options=None):
-    if gr.enable_realtime_scheduling() != gr.RT_OK:
-        print("Error: failed to enable real-time scheduling.")
-
-    if StrictVersion("4.5.0") <= StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
-        style = gr.prefs().get_string('qtgui', 'style', 'raster')
-        Qt.QApplication.setGraphicsSystem(style)
-    qapp = Qt.QApplication(sys.argv)
-
-    tb = top_block_cls()
-
-    tb.start()
-
-    tb.show()
-
-    def sig_handler(sig=None, frame=None):
-        Qt.QApplication.quit()
-
-    signal.signal(signal.SIGINT, sig_handler)
-    signal.signal(signal.SIGTERM, sig_handler)
-
-    timer = Qt.QTimer()
-    timer.start(500)
-    timer.timeout.connect(lambda: None)
-
-    def quitting():
-        tb.stop()
-        tb.wait()
-
-    qapp.aboutToQuit.connect(quitting)
-    qapp.exec_()
-
-if __name__ == '__main__':
-    main()
diff --git a/notebooks/Fading.ipynb b/notebooks/Fading.ipynb
new file mode 100644
index 0000000..e320893
--- /dev/null
+++ b/notebooks/Fading.ipynb
@@ -0,0 +1,108 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "e19197ba",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "\n",
+    "import matplotlib.pyplot as plt\n",
+    "import matplotlib.image as mpimg"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ea1a7a45",
+   "metadata": {},
+   "source": [
+    "# Simple 2 tap fading"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "4465dcd9",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<matplotlib.collections.PathCollection at 0x7f16d0427e20>"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    },
+    {
+     "data": {
+      "image/png": "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\n",
+      "text/plain": [
+       "<Figure size 432x288 with 1 Axes>"
+      ]
+     },
+     "metadata": {
+      "needs_background": "light"
+     },
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "nsamples = 200\n",
+    "samp_rate = 32e3\n",
+    "\n",
+    "# QPSK modulation\n",
+    "samp_per_sym = 4\n",
+    "symbol_map = {\n",
+    "    0: 1 + 1j,\n",
+    "    1: -1 + 1j,\n",
+    "    2: -1 - 1j,\n",
+    "    3: 1 - 1j,\n",
+    "}\n",
+    "\n",
+    "# generate random data for testing\n",
+    "data = np.random.randint(low=0, high=4, size=nsamples)\n",
+    "\n",
+    "# modulate and add AWGN\n",
+    "noise = np.random.normal(0, .03, size=nsamples) + 1j * np.random.normal(0, .03, size=nsamples)\n",
+    "sig = np.array(list(map(lambda v: symbol_map[v], data))) + noise\n",
+    "\n",
+    "# add 2 tap frequency selective channel\n",
+    "delay = np.zeros(5 * samp_per_sym)\n",
+    "one = np.array([1])\n",
+    "taps = np.concatenate([one, delay, .2 * one])\n",
+    "\n",
+    "# apply channel\n",
+    "sig_fading = np.convolve(sig, taps)\n",
+    "\n",
+    "# plot figure\n",
+    "fig = plt.figure()\n",
+    "plt.scatter(sig_fading.real, sig_fading.imag)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/references/books/WsComm_LectureNotes_2021.pdf b/references/books/WsComm_LectureNotes_2021.pdf
new file mode 100644
index 0000000..12b4af6
--- /dev/null
+++ b/references/books/WsComm_LectureNotes_2021.pdf
diff --git a/references/fundamentals/1993-10.pdf b/references/fundamentals/1993-10.pdf
new file mode 100644
index 0000000..4e77426
--- /dev/null
+++ b/references/fundamentals/1993-10.pdf
diff --git a/references/fundamentals/An_overview_of_OFDM_and_related_techniques_towards_development_of_future_wireless_multimedia_communications.pdf b/references/fundamentals/An_overview_of_OFDM_and_related_techniques_towards_development_of_future_wireless_multimedia_communications.pdf
new file mode 100644
index 0000000..250770d
--- /dev/null
+++ b/references/fundamentals/An_overview_of_OFDM_and_related_techniques_towards_development_of_future_wireless_multimedia_communications.pdf
diff --git a/simulation/QAM/lena512color.tiff b/simulation/QAM/lena512color.tiff
new file mode 100644
index 0000000..ffe5c83
--- /dev/null
+++ b/simulation/QAM/lena512color.tiff
diff --git a/simulation/QAM/qam.grc b/simulation/QAM/qam.grc
index d74a8fb..e1d0277 100644
--- a/simulation/QAM/qam.grc
+++ b/simulation/QAM/qam.grc
@@ -8,9 +8,9 @@ options:
     description: ''
     gen_cmake: 'On'
     gen_linking: dynamic
-    generate_options: qt_gui
+    generate_options: no_gui
     hier_block_src_path: '.:'
-    id: qam
+    id: qam_nogui
     max_nouts: '0'
     output_language: python
     placement: (0,0)
@@ -54,7 +54,7 @@ blocks:
     rot_sym: '4'
     soft_dec_lut: None
     sym_map: '[0, 1, 3, 2]'
-    type: 8psk
+    type: 16qam
   states:
     bus_sink: false
     bus_source: false
@@ -63,24 +63,15 @@ blocks:
     rotation: 0
     state: true
 - name: eq_gain
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@1: 0,0,1,1'
-    label: Equalizer Rate
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: '0'
-    step: '.001'
-    stop: '.1'
-    value: '.01'
-    widget: counter_slider
+    value: 10e-3
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1336, 460.0]
+    coordinate: [1336, 212.0]
     rotation: 0
     state: true
 - name: eq_mod
@@ -120,24 +111,15 @@ blocks:
     rotation: 0
     state: true
 - name: freq_offset
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@0: 1,0,1,1'
-    label: Frequency Offset
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: -100e-3
-    step: 1e-3
-    stop: 100e-3
     value: '0'
-    widget: counter_slider
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [640, 460.0]
+    coordinate: [736, 180.0]
     rotation: 0
     state: true
 - name: nfilts
@@ -153,45 +135,27 @@ blocks:
     rotation: 0
     state: true
 - name: noise_volt
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@0: 0,0,1,1'
-    label: Noise Voltage
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: '0'
-    step: '0.01'
-    stop: '1'
-    value: '0.0001'
-    widget: counter_slider
+    value: 100e-6
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [504, 460.0]
+    coordinate: [640, 180.0]
     rotation: 0
     state: true
 - name: phase_bw
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@1: 1,0,1,1'
-    label: Phase Bandwidth
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: '0'
-    step: '.01'
-    stop: '1'
     value: 2 * 3.141592653589793 / 100
-    widget: counter_slider
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1640, 428.0]
+    coordinate: [1640, 188.0]
     rotation: 0
     state: true
 - name: qam_const
@@ -212,7 +176,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [224, 444.0]
+    coordinate: [224, 436.0]
     rotation: 0
     state: true
 - name: rrc_taps
@@ -252,45 +216,27 @@ blocks:
     rotation: 0
     state: true
 - name: time_offset
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@0: 0,1,1,1'
-    label: Timing Offset
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: '0.999'
-    step: '0.0001'
-    stop: '1.001'
-    value: '1.0'
-    widget: counter_slider
+    value: '1'
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [504, 604.0]
+    coordinate: [736, 252.0]
     rotation: 0
     state: true
 - name: timing_loop_bw
-  id: variable_qtgui_range
+  id: variable
   parameters:
     comment: ''
-    gui_hint: 'params@0: 1,1,1,1'
-    label: Time Bandwidth
-    min_len: '200'
-    orient: Qt.Horizontal
-    rangeType: float
-    start: '0'
-    step: 10e-3
-    stop: 200e-3
     value: 2 * 3.141592653589793 / 100
-    widget: counter_slider
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1008, 548.0]
+    coordinate: [1000, 228.0]
     rotation: 0
     state: true
 - name: analog_random_source_x_0
@@ -330,40 +276,21 @@ blocks:
     coordinate: [2272, 276.0]
     rotation: 0
     state: true
-- name: blocks_char_to_float_0_0
-  id: blocks_char_to_float
-  parameters:
-    affinity: ''
-    alias: ''
-    comment: ''
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    scale: '1'
-    vlen: '1'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [408, 840.0]
-    rotation: 0
-    state: true
-- name: blocks_delay_0
-  id: blocks_delay
+- name: blocks_null_sink_0
+  id: blocks_null_sink
   parameters:
     affinity: ''
     alias: ''
+    bus_structure_sink: '[[0,],]'
     comment: ''
-    delay: '50'
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    num_ports: '1'
+    num_inputs: '1'
     type: float
     vlen: '1'
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [2264, 844.0]
+    coordinate: [2488, 280.0]
     rotation: 0
     state: true
 - name: blocks_throttle_0
@@ -401,22 +328,6 @@ blocks:
     coordinate: [2192, 436.0]
     rotation: 0
     state: true
-- name: blocks_unpack_k_bits_bb_0_0
-  id: blocks_unpack_k_bits_bb
-  parameters:
-    affinity: ''
-    alias: ''
-    comment: ''
-    k: '2'
-    maxoutbuf: '0'
-    minoutbuf: '0'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [232, 840.0]
-    rotation: 0
-    state: true
 - name: channels_channel_model_0
   id: channels_channel_model
   parameters:
@@ -449,7 +360,7 @@ blocks:
     modulus: eq_mod
     mu: eq_gain
     num_taps: eq_ntaps
-    sps: '2'
+    sps: sps
   states:
     bus_sink: false
     bus_source: false
@@ -556,7 +467,7 @@ blocks:
     max_dev: '1.5'
     maxoutbuf: '0'
     minoutbuf: '0'
-    osps: '2'
+    osps: sps
     sps: sps * 1.001
     taps: rrc_taps
     type: ccf
@@ -567,642 +478,20 @@ blocks:
     coordinate: [1000, 308.0]
     rotation: 0
     state: true
-- name: params
-  id: qtgui_tab_widget
-  parameters:
-    alias: ''
-    comment: ''
-    gui_hint: ''
-    label0: Channel
-    label1: Receiver
-    label10: Tab 10
-    label11: Tab 11
-    label12: Tab 12
-    label13: Tab 13
-    label14: Tab 14
-    label15: Tab 15
-    label16: Tab 16
-    label17: Tab 17
-    label18: Tab 18
-    label19: Tab 19
-    label2: Tab 2
-    label3: Tab 3
-    label4: Tab 4
-    label5: Tab 5
-    label6: Tab 6
-    label7: Tab 7
-    label8: Tab 8
-    label9: Tab 9
-    num_tabs: '2'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [296, 12.0]
-    rotation: 0
-    state: true
-- name: plots
-  id: qtgui_tab_widget
-  parameters:
-    alias: ''
-    comment: ''
-    gui_hint: ''
-    label0: Constellations
-    label1: Frequency
-    label10: Tab 10
-    label11: Tab 11
-    label12: Tab 12
-    label13: Tab 13
-    label14: Tab 14
-    label15: Tab 15
-    label16: Tab 16
-    label17: Tab 17
-    label18: Tab 18
-    label19: Tab 19
-    label2: Time
-    label3: Tab 3
-    label4: Tab 4
-    label5: Tab 5
-    label6: Tab 6
-    label7: Tab 7
-    label8: Tab 8
-    label9: Tab 9
-    num_tabs: '3'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [448, 12.0]
-    rotation: 0
-    state: true
-- name: qtgui_const_sink_x_0
-  id: qtgui_const_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    axislabels: 'True'
-    color1: '"blue"'
-    color10: '"red"'
-    color2: '"red"'
-    color3: '"red"'
-    color4: '"red"'
-    color5: '"red"'
-    color6: '"red"'
-    color7: '"red"'
-    color8: '"red"'
-    color9: '"red"'
-    comment: ''
-    grid: 'False'
-    gui_hint: 'plots@0: 0,0,1,1'
-    label1: ''
-    label10: ''
-    label2: ''
-    label3: ''
-    label4: ''
-    label5: ''
-    label6: ''
-    label7: ''
-    label8: ''
-    label9: ''
-    legend: 'True'
-    marker1: '0'
-    marker10: '0'
-    marker2: '0'
-    marker3: '0'
-    marker4: '0'
-    marker5: '0'
-    marker6: '0'
-    marker7: '0'
-    marker8: '0'
-    marker9: '0'
-    name: '"Channel"'
-    nconnections: '1'
-    size: '2048'
-    style1: '0'
-    style10: '0'
-    style2: '0'
-    style3: '0'
-    style4: '0'
-    style5: '0'
-    style6: '0'
-    style7: '0'
-    style8: '0'
-    style9: '0'
-    tr_chan: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_slope: qtgui.TRIG_SLOPE_POS
-    tr_tag: '""'
-    type: complex
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    xmax: '2'
-    xmin: '-2'
-    ymax: '2'
-    ymin: '-2'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [836.0, 128]
-    rotation: 90
-    state: enabled
-- name: qtgui_const_sink_x_0_0
-  id: qtgui_const_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    axislabels: 'True'
-    color1: '"blue"'
-    color10: '"red"'
-    color2: '"red"'
-    color3: '"red"'
-    color4: '"red"'
-    color5: '"red"'
-    color6: '"red"'
-    color7: '"red"'
-    color8: '"red"'
-    color9: '"red"'
-    comment: ''
-    grid: 'False'
-    gui_hint: 'plots@0: 0,1,1,1'
-    label1: ''
-    label10: ''
-    label2: ''
-    label3: ''
-    label4: ''
-    label5: ''
-    label6: ''
-    label7: ''
-    label8: ''
-    label9: ''
-    legend: 'True'
-    marker1: '0'
-    marker10: '0'
-    marker2: '0'
-    marker3: '0'
-    marker4: '0'
-    marker5: '0'
-    marker6: '0'
-    marker7: '0'
-    marker8: '0'
-    marker9: '0'
-    name: '"Synchronized"'
-    nconnections: '1'
-    size: '2048'
-    style1: '0'
-    style10: '0'
-    style2: '0'
-    style3: '0'
-    style4: '0'
-    style5: '0'
-    style6: '0'
-    style7: '0'
-    style8: '0'
-    style9: '0'
-    tr_chan: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_slope: qtgui.TRIG_SLOPE_POS
-    tr_tag: '""'
-    type: complex
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    xmax: '2'
-    xmin: '-2'
-    ymax: '2'
-    ymin: '-2'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [1228.0, 88]
-    rotation: 90
-    state: enabled
-- name: qtgui_const_sink_x_1
-  id: qtgui_const_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    axislabels: 'True'
-    color1: '"blue"'
-    color10: '"red"'
-    color2: '"red"'
-    color3: '"red"'
-    color4: '"red"'
-    color5: '"red"'
-    color6: '"red"'
-    color7: '"red"'
-    color8: '"red"'
-    color9: '"red"'
-    comment: ''
-    grid: 'False'
-    gui_hint: 'plots@0: 1,0,1,1'
-    label1: ''
-    label10: ''
-    label2: ''
-    label3: ''
-    label4: ''
-    label5: ''
-    label6: ''
-    label7: ''
-    label8: ''
-    label9: ''
-    legend: 'True'
-    marker1: '0'
-    marker10: '0'
-    marker2: '0'
-    marker3: '0'
-    marker4: '0'
-    marker5: '0'
-    marker6: '0'
-    marker7: '0'
-    marker8: '0'
-    marker9: '0'
-    name: '"Equalized"'
-    nconnections: '1'
-    size: '1024'
-    style1: '0'
-    style10: '0'
-    style2: '0'
-    style3: '0'
-    style4: '0'
-    style5: '0'
-    style6: '0'
-    style7: '0'
-    style8: '0'
-    style9: '0'
-    tr_chan: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_slope: qtgui.TRIG_SLOPE_POS
-    tr_tag: '""'
-    type: complex
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    xmax: '2'
-    xmin: '-2'
-    ymax: '2'
-    ymin: '-2'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [1524.0, 88]
-    rotation: 90
-    state: true
-- name: qtgui_const_sink_x_2
-  id: qtgui_const_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    axislabels: 'True'
-    color1: '"blue"'
-    color10: '"red"'
-    color2: '"red"'
-    color3: '"red"'
-    color4: '"red"'
-    color5: '"red"'
-    color6: '"red"'
-    color7: '"red"'
-    color8: '"red"'
-    color9: '"red"'
-    comment: ''
-    grid: 'False'
-    gui_hint: 'plots@0: 1,1,1,1'
-    label1: ''
-    label10: ''
-    label2: ''
-    label3: ''
-    label4: ''
-    label5: ''
-    label6: ''
-    label7: ''
-    label8: ''
-    label9: ''
-    legend: 'True'
-    marker1: '0'
-    marker10: '0'
-    marker2: '0'
-    marker3: '0'
-    marker4: '0'
-    marker5: '0'
-    marker6: '0'
-    marker7: '0'
-    marker8: '0'
-    marker9: '0'
-    name: '"Locked"'
-    nconnections: '1'
-    size: '1024'
-    style1: '0'
-    style10: '0'
-    style2: '0'
-    style3: '0'
-    style4: '0'
-    style5: '0'
-    style6: '0'
-    style7: '0'
-    style8: '0'
-    style9: '0'
-    tr_chan: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_slope: qtgui.TRIG_SLOPE_POS
-    tr_tag: '""'
-    type: complex
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    xmax: '2'
-    xmin: '-2'
-    ymax: '2'
-    ymin: '-2'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [1860.0, 64]
-    rotation: 90
-    state: true
-- name: qtgui_freq_sink_x_0
-  id: qtgui_freq_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    average: '1.0'
-    axislabels: 'True'
-    bw: samp_rate
-    color1: '"blue"'
-    color10: '"dark blue"'
-    color2: '"red"'
-    color3: '"green"'
-    color4: '"black"'
-    color5: '"cyan"'
-    color6: '"magenta"'
-    color7: '"yellow"'
-    color8: '"dark red"'
-    color9: '"dark green"'
-    comment: ''
-    ctrlpanel: 'False'
-    fc: '0'
-    fftsize: '1024'
-    freqhalf: 'True'
-    grid: 'False'
-    gui_hint: 'plots@1: 0,0,1,1'
-    label: Relative Gain
-    label1: ''
-    label10: ''''''
-    label2: ''''''
-    label3: ''''''
-    label4: ''''''
-    label5: ''''''
-    label6: ''''''
-    label7: ''''''
-    label8: ''''''
-    label9: ''''''
-    legend: 'True'
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    name: '"Channel"'
-    nconnections: '1'
-    showports: 'False'
-    tr_chan: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_tag: '""'
-    type: complex
-    units: dB
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    wintype: firdes.WIN_BLACKMAN_hARRIS
-    ymax: '10'
-    ymin: '-140'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [856.0, 472]
-    rotation: 270
-    state: true
-- name: qtgui_time_sink_x_0
-  id: qtgui_time_sink_x
-  parameters:
-    affinity: ''
-    alias: ''
-    alpha1: '1.0'
-    alpha10: '1.0'
-    alpha2: '1.0'
-    alpha3: '1.0'
-    alpha4: '1.0'
-    alpha5: '1.0'
-    alpha6: '1.0'
-    alpha7: '1.0'
-    alpha8: '1.0'
-    alpha9: '1.0'
-    autoscale: 'False'
-    axislabels: 'True'
-    color1: blue
-    color10: dark blue
-    color2: red
-    color3: green
-    color4: black
-    color5: cyan
-    color6: magenta
-    color7: yellow
-    color8: dark red
-    color9: dark green
-    comment: ''
-    ctrlpanel: 'False'
-    entags: 'True'
-    grid: 'False'
-    gui_hint: 'plots@2: 0,0,1,1'
-    label1: Received
-    label10: Signal 10
-    label2: Sent
-    label3: Signal 3
-    label4: Signal 4
-    label5: Signal 5
-    label6: Signal 6
-    label7: Signal 7
-    label8: Signal 8
-    label9: Signal 9
-    legend: 'True'
-    marker1: '-1'
-    marker10: '-1'
-    marker2: '-1'
-    marker3: '-1'
-    marker4: '-1'
-    marker5: '-1'
-    marker6: '-1'
-    marker7: '-1'
-    marker8: '-1'
-    marker9: '-1'
-    name: '"Decoded"'
-    nconnections: '2'
-    size: '1024'
-    srate: samp_rate
-    stemplot: 'False'
-    style1: '1'
-    style10: '1'
-    style2: '1'
-    style3: '1'
-    style4: '1'
-    style5: '1'
-    style6: '1'
-    style7: '1'
-    style8: '1'
-    style9: '1'
-    tr_chan: '0'
-    tr_delay: '0'
-    tr_level: '0.0'
-    tr_mode: qtgui.TRIG_MODE_FREE
-    tr_slope: qtgui.TRIG_SLOPE_POS
-    tr_tag: '""'
-    type: float
-    update_time: '0.10'
-    width1: '1'
-    width10: '1'
-    width2: '1'
-    width3: '1'
-    width4: '1'
-    width5: '1'
-    width6: '1'
-    width7: '1'
-    width8: '1'
-    width9: '1'
-    ylabel: Amplitude
-    ymax: '1'
-    ymin: '-1'
-    yunit: '""'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [2504, 268.0]
-    rotation: 0
-    state: true
 
 connections:
-- [analog_random_source_x_0, '0', blocks_unpack_k_bits_bb_0_0, '0']
 - [analog_random_source_x_0, '0', digital_constellation_modulator_0, '0']
-- [blocks_char_to_float_0, '0', qtgui_time_sink_x_0, '0']
-- [blocks_char_to_float_0_0, '0', blocks_delay_0, '0']
-- [blocks_delay_0, '0', qtgui_time_sink_x_0, '1']
+- [blocks_char_to_float_0, '0', blocks_null_sink_0, '0']
 - [blocks_throttle_0, '0', channels_channel_model_0, '0']
 - [blocks_unpack_k_bits_bb_0, '0', blocks_char_to_float_0, '0']
-- [blocks_unpack_k_bits_bb_0_0, '0', blocks_char_to_float_0_0, '0']
 - [channels_channel_model_0, '0', digital_pfb_clock_sync_xxx_0, '0']
-- [channels_channel_model_0, '0', qtgui_const_sink_x_0, '0']
-- [channels_channel_model_0, '0', qtgui_freq_sink_x_0, '0']
 - [digital_cma_equalizer_cc_0, '0', digital_costas_loop_cc_0, '0']
-- [digital_cma_equalizer_cc_0, '0', qtgui_const_sink_x_1, '0']
 - [digital_constellation_decoder_cb_0, '0', digital_diff_decoder_bb_0, '0']
 - [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
 - [digital_costas_loop_cc_0, '0', digital_constellation_decoder_cb_0, '0']
-- [digital_costas_loop_cc_0, '0', qtgui_const_sink_x_2, '0']
 - [digital_diff_decoder_bb_0, '0', digital_map_bb_0, '0']
 - [digital_map_bb_0, '0', blocks_unpack_k_bits_bb_0, '0']
 - [digital_pfb_clock_sync_xxx_0, '0', digital_cma_equalizer_cc_0, '0']
-- [digital_pfb_clock_sync_xxx_0, '0', qtgui_const_sink_x_0_0, '0']
 
 metadata:
   file_format: 1
diff --git a/simulation/QAM/qam.py b/simulation/QAM/qam.py
index 8977787..d64a687 100755
--- a/simulation/QAM/qam.py
+++ b/simulation/QAM/qam.py
@@ -90,7 +90,7 @@ class qam(gr.top_block, Qt.QWidget):
         self.eq_ntaps = eq_ntaps = 15
         self.eq_mod = eq_mod = 1
         self.eq_gain = eq_gain = .01
-        self.const = const = digital.constellation_8psk().base()
+        self.const = const = digital.constellation_16qam().base()
         self.chn_taps = chn_taps = [1.0 + 0.0j, ]
 
         ##################################################
@@ -438,7 +438,7 @@ class qam(gr.top_block, Qt.QWidget):
             self.plots_grid_layout_0.setRowStretch(r, 1)
         for c in range(0, 1):
             self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps * 1.001, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, 2)
+        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps * 1.001, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, sps)
         self.digital_map_bb_0 = digital.map_bb([0, 1, 3, 2])
         self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(4)
         self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, 4, False)
@@ -451,7 +451,7 @@ class qam(gr.top_block, Qt.QWidget):
             verbose=False,
             log=False)
         self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(const)
-        self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(eq_ntaps, eq_mod, eq_gain, 2)
+        self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(eq_ntaps, eq_mod, eq_gain, sps)
         self.channels_channel_model_0 = channels.channel_model(
             noise_voltage=noise_volt,
             frequency_offset=freq_offset,
diff --git a/simulation/QAM/qam_nogui.grc b/simulation/QAM/qam_nogui.grc
new file mode 100644
index 0000000..1264e80
--- /dev/null
+++ b/simulation/QAM/qam_nogui.grc
@@ -0,0 +1,1208 @@
+options:
+  parameters:
+    author: Pross Naoki, Halter Sara Cinzia
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: qt_gui
+    hier_block_src_path: '.:'
+    id: qam
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: '1'
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: prompt
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: QAM
+    window_size: ''
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [8, 8]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: chn_taps
+  id: variable
+  parameters:
+    comment: ''
+    value: '[1.0 + 0.0j, ]'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [640, 252.0]
+    rotation: 0
+    state: true
+- name: const
+  id: variable_constellation
+  parameters:
+    comment: ''
+    const_points: '[-1-1j, -1+1j, 1+1j, 1-1j]'
+    dims: '1'
+    precision: '8'
+    rot_sym: '4'
+    soft_dec_lut: None
+    sym_map: '[0, 1, 3, 2]'
+    type: 16qam
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [224, 604.0]
+    rotation: 0
+    state: true
+- name: eq_gain
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@1: 0,0,1,1'
+    label: Equalizer Rate
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: '0'
+    step: '.001'
+    stop: '.1'
+    value: '.01'
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1336, 460.0]
+    rotation: 0
+    state: true
+- name: eq_mod
+  id: variable
+  parameters:
+    comment: ''
+    value: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1336, 388.0]
+    rotation: 0
+    state: true
+- name: eq_ntaps
+  id: variable
+  parameters:
+    comment: ''
+    value: '15'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1416, 388.0]
+    rotation: 0
+    state: true
+- name: excess_bw
+  id: variable
+  parameters:
+    comment: ''
+    value: 350e-3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [320, 268.0]
+    rotation: 0
+    state: true
+- name: freq_offset
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@0: 1,0,1,1'
+    label: Frequency Offset
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: -100e-3
+    step: 1e-3
+    stop: 100e-3
+    value: '0'
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [640, 460.0]
+    rotation: 0
+    state: true
+- name: nfilts
+  id: variable
+  parameters:
+    comment: ''
+    value: '32'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1008, 476.0]
+    rotation: 0
+    state: true
+- name: noise_volt
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@0: 0,0,1,1'
+    label: Noise Voltage
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: '0'
+    step: '0.01'
+    stop: '1'
+    value: '0.0001'
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [504, 460.0]
+    rotation: 0
+    state: true
+- name: phase_bw
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@1: 1,0,1,1'
+    label: Phase Bandwidth
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: '0'
+    step: '.01'
+    stop: '1'
+    value: 2 * 3.141592653589793 / 100
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1640, 428.0]
+    rotation: 0
+    state: true
+- name: qam_const
+  id: variable_constellation_rect
+  parameters:
+    comment: ''
+    const_points: '[(-3-3j), (-1-3j), (1-3j), (3-3j), (-3-1j), (-1-1j), (1-1j), (3-1j),
+      (-3+1j), (-1+1j), (1+1j), (3+1j), (-3+3j), (-1+3j), (1+3j), (3+3j)]'
+    imag_sect: '1'
+    precision: '4'
+    real_sect: '1'
+    rot_sym: '4'
+    soft_dec_lut: None
+    sym_map: '[0, 4, 12, 8, 1, 5, 13, 9, 3, 7, 15, 11, 2, 6, 14, 10]'
+    w_imag_sect: '1'
+    w_real_sect: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [224, 436.0]
+    rotation: 0
+    state: true
+- name: rrc_taps
+  id: variable
+  parameters:
+    comment: ''
+    value: firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1080, 476.0]
+    rotation: 0
+    state: true
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: '32000'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [192, 12.0]
+    rotation: 0
+    state: enabled
+- name: sps
+  id: variable
+  parameters:
+    comment: ''
+    value: '4'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [224, 268.0]
+    rotation: 0
+    state: true
+- name: time_offset
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@0: 0,1,1,1'
+    label: Timing Offset
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: '0.999'
+    step: '0.0001'
+    stop: '1.001'
+    value: '1.0'
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [504, 604.0]
+    rotation: 0
+    state: true
+- name: timing_loop_bw
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: 'params@0: 1,1,1,1'
+    label: Time Bandwidth
+    min_len: '200'
+    orient: Qt.Horizontal
+    rangeType: float
+    start: '0'
+    step: 10e-3
+    stop: 200e-3
+    value: 2 * 3.141592653589793 / 100
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1008, 548.0]
+    rotation: 0
+    state: true
+- name: analog_random_source_x_0
+  id: analog_random_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    max: '256'
+    maxoutbuf: '0'
+    min: '0'
+    minoutbuf: '0'
+    num_samps: '1000'
+    repeat: 'True'
+    type: byte
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [32, 332.0]
+    rotation: 0
+    state: enabled
+- name: blocks_char_to_float_0
+  id: blocks_char_to_float
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    scale: '1'
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [2272, 276.0]
+    rotation: 0
+    state: true
+- name: blocks_char_to_float_0_0
+  id: blocks_char_to_float
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    scale: '1'
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [408, 840.0]
+    rotation: 0
+    state: true
+- name: blocks_delay_0
+  id: blocks_delay
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    delay: '50'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_ports: '1'
+    type: float
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [2264, 844.0]
+    rotation: 0
+    state: true
+- name: blocks_throttle_0
+  id: blocks_throttle
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    ignoretag: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_second: samp_rate
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [464, 356.0]
+    rotation: 0
+    state: enabled
+- name: blocks_unpack_k_bits_bb_0
+  id: blocks_unpack_k_bits_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    k: '2'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [2192, 436.0]
+    rotation: 0
+    state: true
+- name: blocks_unpack_k_bits_bb_0_0
+  id: blocks_unpack_k_bits_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    k: '2'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [232, 840.0]
+    rotation: 0
+    state: true
+- name: channels_channel_model_0
+  id: channels_channel_model
+  parameters:
+    affinity: ''
+    alias: ''
+    block_tags: 'False'
+    comment: ''
+    epsilon: time_offset
+    freq_offset: freq_offset
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    noise_voltage: noise_volt
+    seed: '0'
+    taps: chn_taps
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [640, 316.0]
+    rotation: 0
+    state: enabled
+- name: digital_cma_equalizer_cc_0
+  id: digital_cma_equalizer_cc
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    modulus: eq_mod
+    mu: eq_gain
+    num_taps: eq_ntaps
+    sps: sps
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1336, 284.0]
+    rotation: 0
+    state: true
+- name: digital_constellation_decoder_cb_0
+  id: digital_constellation_decoder_cb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    constellation: const
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1976, 276.0]
+    rotation: 0
+    state: true
+- name: digital_constellation_modulator_0
+  id: digital_constellation_modulator
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    constellation: const
+    differential: 'True'
+    excess_bw: excess_bw
+    log: 'False'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_symbol: sps
+    verbose: 'False'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [224, 332.0]
+    rotation: 0
+    state: enabled
+- name: digital_costas_loop_cc_0
+  id: digital_costas_loop_cc
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    order: '4'
+    use_snr: 'False'
+    w: phase_bw
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1640, 280.0]
+    rotation: 0
+    state: true
+- name: digital_diff_decoder_bb_0
+  id: digital_diff_decoder_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    modulus: '4'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1976, 348.0]
+    rotation: 180
+    state: true
+- name: digital_map_bb_0
+  id: digital_map_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    map: '[0, 1, 3, 2]'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1984, 436.0]
+    rotation: 0
+    state: true
+- name: digital_pfb_clock_sync_xxx_0
+  id: digital_pfb_clock_sync_xxx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    filter_size: nfilts
+    init_phase: nfilts/2
+    loop_bw: timing_loop_bw
+    max_dev: '1.5'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    osps: sps
+    sps: sps * 1.001
+    taps: rrc_taps
+    type: ccf
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1000, 308.0]
+    rotation: 0
+    state: true
+- name: params
+  id: qtgui_tab_widget
+  parameters:
+    alias: ''
+    comment: ''
+    gui_hint: ''
+    label0: Channel
+    label1: Receiver
+    label10: Tab 10
+    label11: Tab 11
+    label12: Tab 12
+    label13: Tab 13
+    label14: Tab 14
+    label15: Tab 15
+    label16: Tab 16
+    label17: Tab 17
+    label18: Tab 18
+    label19: Tab 19
+    label2: Tab 2
+    label3: Tab 3
+    label4: Tab 4
+    label5: Tab 5
+    label6: Tab 6
+    label7: Tab 7
+    label8: Tab 8
+    label9: Tab 9
+    num_tabs: '2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [296, 12.0]
+    rotation: 0
+    state: true
+- name: plots
+  id: qtgui_tab_widget
+  parameters:
+    alias: ''
+    comment: ''
+    gui_hint: ''
+    label0: Constellations
+    label1: Frequency
+    label10: Tab 10
+    label11: Tab 11
+    label12: Tab 12
+    label13: Tab 13
+    label14: Tab 14
+    label15: Tab 15
+    label16: Tab 16
+    label17: Tab 17
+    label18: Tab 18
+    label19: Tab 19
+    label2: Time
+    label3: Tab 3
+    label4: Tab 4
+    label5: Tab 5
+    label6: Tab 6
+    label7: Tab 7
+    label8: Tab 8
+    label9: Tab 9
+    num_tabs: '3'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [448, 12.0]
+    rotation: 0
+    state: true
+- name: qtgui_const_sink_x_0
+  id: qtgui_const_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: '"blue"'
+    color10: '"red"'
+    color2: '"red"'
+    color3: '"red"'
+    color4: '"red"'
+    color5: '"red"'
+    color6: '"red"'
+    color7: '"red"'
+    color8: '"red"'
+    color9: '"red"'
+    comment: ''
+    grid: 'False'
+    gui_hint: 'plots@0: 0,0,1,1'
+    label1: ''
+    label10: ''
+    label2: ''
+    label3: ''
+    label4: ''
+    label5: ''
+    label6: ''
+    label7: ''
+    label8: ''
+    label9: ''
+    legend: 'True'
+    marker1: '0'
+    marker10: '0'
+    marker2: '0'
+    marker3: '0'
+    marker4: '0'
+    marker5: '0'
+    marker6: '0'
+    marker7: '0'
+    marker8: '0'
+    marker9: '0'
+    name: '"Channel"'
+    nconnections: '1'
+    size: '2048'
+    style1: '0'
+    style10: '0'
+    style2: '0'
+    style3: '0'
+    style4: '0'
+    style5: '0'
+    style6: '0'
+    style7: '0'
+    style8: '0'
+    style9: '0'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: complex
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    xmax: '2'
+    xmin: '-2'
+    ymax: '2'
+    ymin: '-2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [836.0, 128]
+    rotation: 90
+    state: enabled
+- name: qtgui_const_sink_x_0_0
+  id: qtgui_const_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: '"blue"'
+    color10: '"red"'
+    color2: '"red"'
+    color3: '"red"'
+    color4: '"red"'
+    color5: '"red"'
+    color6: '"red"'
+    color7: '"red"'
+    color8: '"red"'
+    color9: '"red"'
+    comment: ''
+    grid: 'False'
+    gui_hint: 'plots@0: 0,1,1,1'
+    label1: ''
+    label10: ''
+    label2: ''
+    label3: ''
+    label4: ''
+    label5: ''
+    label6: ''
+    label7: ''
+    label8: ''
+    label9: ''
+    legend: 'True'
+    marker1: '0'
+    marker10: '0'
+    marker2: '0'
+    marker3: '0'
+    marker4: '0'
+    marker5: '0'
+    marker6: '0'
+    marker7: '0'
+    marker8: '0'
+    marker9: '0'
+    name: '"Synchronized"'
+    nconnections: '1'
+    size: '2048'
+    style1: '0'
+    style10: '0'
+    style2: '0'
+    style3: '0'
+    style4: '0'
+    style5: '0'
+    style6: '0'
+    style7: '0'
+    style8: '0'
+    style9: '0'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: complex
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    xmax: '2'
+    xmin: '-2'
+    ymax: '2'
+    ymin: '-2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1228.0, 88]
+    rotation: 90
+    state: enabled
+- name: qtgui_const_sink_x_1
+  id: qtgui_const_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: '"blue"'
+    color10: '"red"'
+    color2: '"red"'
+    color3: '"red"'
+    color4: '"red"'
+    color5: '"red"'
+    color6: '"red"'
+    color7: '"red"'
+    color8: '"red"'
+    color9: '"red"'
+    comment: ''
+    grid: 'False'
+    gui_hint: 'plots@0: 1,0,1,1'
+    label1: ''
+    label10: ''
+    label2: ''
+    label3: ''
+    label4: ''
+    label5: ''
+    label6: ''
+    label7: ''
+    label8: ''
+    label9: ''
+    legend: 'True'
+    marker1: '0'
+    marker10: '0'
+    marker2: '0'
+    marker3: '0'
+    marker4: '0'
+    marker5: '0'
+    marker6: '0'
+    marker7: '0'
+    marker8: '0'
+    marker9: '0'
+    name: '"Equalized"'
+    nconnections: '1'
+    size: '1024'
+    style1: '0'
+    style10: '0'
+    style2: '0'
+    style3: '0'
+    style4: '0'
+    style5: '0'
+    style6: '0'
+    style7: '0'
+    style8: '0'
+    style9: '0'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: complex
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    xmax: '2'
+    xmin: '-2'
+    ymax: '2'
+    ymin: '-2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1524.0, 88]
+    rotation: 90
+    state: true
+- name: qtgui_const_sink_x_2
+  id: qtgui_const_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: '"blue"'
+    color10: '"red"'
+    color2: '"red"'
+    color3: '"red"'
+    color4: '"red"'
+    color5: '"red"'
+    color6: '"red"'
+    color7: '"red"'
+    color8: '"red"'
+    color9: '"red"'
+    comment: ''
+    grid: 'False'
+    gui_hint: 'plots@0: 1,1,1,1'
+    label1: ''
+    label10: ''
+    label2: ''
+    label3: ''
+    label4: ''
+    label5: ''
+    label6: ''
+    label7: ''
+    label8: ''
+    label9: ''
+    legend: 'True'
+    marker1: '0'
+    marker10: '0'
+    marker2: '0'
+    marker3: '0'
+    marker4: '0'
+    marker5: '0'
+    marker6: '0'
+    marker7: '0'
+    marker8: '0'
+    marker9: '0'
+    name: '"Locked"'
+    nconnections: '1'
+    size: '1024'
+    style1: '0'
+    style10: '0'
+    style2: '0'
+    style3: '0'
+    style4: '0'
+    style5: '0'
+    style6: '0'
+    style7: '0'
+    style8: '0'
+    style9: '0'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: complex
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    xmax: '2'
+    xmin: '-2'
+    ymax: '2'
+    ymin: '-2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1860.0, 64]
+    rotation: 90
+    state: true
+- name: qtgui_freq_sink_x_0
+  id: qtgui_freq_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    average: '1.0'
+    axislabels: 'True'
+    bw: samp_rate
+    color1: '"blue"'
+    color10: '"dark blue"'
+    color2: '"red"'
+    color3: '"green"'
+    color4: '"black"'
+    color5: '"cyan"'
+    color6: '"magenta"'
+    color7: '"yellow"'
+    color8: '"dark red"'
+    color9: '"dark green"'
+    comment: ''
+    ctrlpanel: 'False'
+    fc: '0'
+    fftsize: '1024'
+    freqhalf: 'True'
+    grid: 'False'
+    gui_hint: 'plots@1: 0,0,1,1'
+    label: Relative Gain
+    label1: ''
+    label10: ''''''
+    label2: ''''''
+    label3: ''''''
+    label4: ''''''
+    label5: ''''''
+    label6: ''''''
+    label7: ''''''
+    label8: ''''''
+    label9: ''''''
+    legend: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    name: '"Channel"'
+    nconnections: '1'
+    showports: 'False'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_tag: '""'
+    type: complex
+    units: dB
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    wintype: firdes.WIN_BLACKMAN_hARRIS
+    ymax: '10'
+    ymin: '-140'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [856.0, 472]
+    rotation: 270
+    state: true
+- name: qtgui_time_sink_x_0
+  id: qtgui_time_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: blue
+    color10: dark blue
+    color2: red
+    color3: green
+    color4: black
+    color5: cyan
+    color6: magenta
+    color7: yellow
+    color8: dark red
+    color9: dark green
+    comment: ''
+    ctrlpanel: 'False'
+    entags: 'True'
+    grid: 'False'
+    gui_hint: 'plots@2: 0,0,1,1'
+    label1: Received
+    label10: Signal 10
+    label2: Sent
+    label3: Signal 3
+    label4: Signal 4
+    label5: Signal 5
+    label6: Signal 6
+    label7: Signal 7
+    label8: Signal 8
+    label9: Signal 9
+    legend: 'True'
+    marker1: '-1'
+    marker10: '-1'
+    marker2: '-1'
+    marker3: '-1'
+    marker4: '-1'
+    marker5: '-1'
+    marker6: '-1'
+    marker7: '-1'
+    marker8: '-1'
+    marker9: '-1'
+    name: '"Decoded"'
+    nconnections: '2'
+    size: '1024'
+    srate: samp_rate
+    stemplot: 'False'
+    style1: '1'
+    style10: '1'
+    style2: '1'
+    style3: '1'
+    style4: '1'
+    style5: '1'
+    style6: '1'
+    style7: '1'
+    style8: '1'
+    style9: '1'
+    tr_chan: '0'
+    tr_delay: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: float
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    ylabel: Amplitude
+    ymax: '1'
+    ymin: '-1'
+    yunit: '""'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [2504, 268.0]
+    rotation: 0
+    state: true
+
+connections:
+- [analog_random_source_x_0, '0', blocks_unpack_k_bits_bb_0_0, '0']
+- [analog_random_source_x_0, '0', digital_constellation_modulator_0, '0']
+- [blocks_char_to_float_0, '0', qtgui_time_sink_x_0, '0']
+- [blocks_char_to_float_0_0, '0', blocks_delay_0, '0']
+- [blocks_delay_0, '0', qtgui_time_sink_x_0, '1']
+- [blocks_throttle_0, '0', channels_channel_model_0, '0']
+- [blocks_unpack_k_bits_bb_0, '0', blocks_char_to_float_0, '0']
+- [blocks_unpack_k_bits_bb_0_0, '0', blocks_char_to_float_0_0, '0']
+- [channels_channel_model_0, '0', digital_pfb_clock_sync_xxx_0, '0']
+- [channels_channel_model_0, '0', qtgui_const_sink_x_0, '0']
+- [channels_channel_model_0, '0', qtgui_freq_sink_x_0, '0']
+- [digital_cma_equalizer_cc_0, '0', digital_costas_loop_cc_0, '0']
+- [digital_cma_equalizer_cc_0, '0', qtgui_const_sink_x_1, '0']
+- [digital_constellation_decoder_cb_0, '0', digital_diff_decoder_bb_0, '0']
+- [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
+- [digital_costas_loop_cc_0, '0', digital_constellation_decoder_cb_0, '0']
+- [digital_costas_loop_cc_0, '0', qtgui_const_sink_x_2, '0']
+- [digital_diff_decoder_bb_0, '0', digital_map_bb_0, '0']
+- [digital_map_bb_0, '0', blocks_unpack_k_bits_bb_0, '0']
+- [digital_pfb_clock_sync_xxx_0, '0', digital_cma_equalizer_cc_0, '0']
+- [digital_pfb_clock_sync_xxx_0, '0', qtgui_const_sink_x_0_0, '0']
+
+metadata:
+  file_format: 1
diff --git a/simulation/QAM/qam_nogui.py b/simulation/QAM/qam_nogui.py
new file mode 100755
index 0000000..67ee236
--- /dev/null
+++ b/simulation/QAM/qam_nogui.py
@@ -0,0 +1,238 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+#
+# SPDX-License-Identifier: GPL-3.0
+#
+# GNU Radio Python Flow Graph
+# Title: QAM
+# Author: Pross Naoki, Halter Sara Cinzia
+# GNU Radio version: 3.8.2.0
+
+from gnuradio import blocks
+import numpy
+from gnuradio import channels
+from gnuradio.filter import firdes
+from gnuradio import digital
+from gnuradio import gr
+import sys
+import signal
+from argparse import ArgumentParser
+from gnuradio.eng_arg import eng_float, intx
+from gnuradio import eng_notation
+
+
+class qam_nogui(gr.top_block):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "QAM")
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.sps = sps = 4
+        self.nfilts = nfilts = 32
+        self.excess_bw = excess_bw = 350e-3
+        self.timing_loop_bw = timing_loop_bw = 2 * 3.141592653589793 / 100
+        self.time_offset = time_offset = 1
+        self.samp_rate = samp_rate = 32000
+        self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
+        self.qam_const = qam_const = digital.constellation_rect([(-3-3j), (-1-3j), (1-3j), (3-3j), (-3-1j), (-1-1j), (1-1j), (3-1j), (-3+1j), (-1+1j), (1+1j), (3+1j), (-3+3j), (-1+3j), (1+3j), (3+3j)], [0, 4, 12, 8, 1, 5, 13, 9, 3, 7, 15, 11, 2, 6, 14, 10],
+        4, 1, 1, 1, 1).base()
+        self.phase_bw = phase_bw = 2 * 3.141592653589793 / 100
+        self.noise_volt = noise_volt = 100e-6
+        self.freq_offset = freq_offset = 0
+        self.eq_ntaps = eq_ntaps = 15
+        self.eq_mod = eq_mod = 1
+        self.eq_gain = eq_gain = 10e-3
+        self.const = const = digital.constellation_16qam().base()
+        self.chn_taps = chn_taps = [1.0 + 0.0j, ]
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps * 1.001, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, sps)
+        self.digital_map_bb_0 = digital.map_bb([0, 1, 3, 2])
+        self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(4)
+        self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, 4, False)
+        self.digital_constellation_modulator_0 = digital.generic_mod(
+            constellation=const,
+            differential=True,
+            samples_per_symbol=sps,
+            pre_diff_code=True,
+            excess_bw=excess_bw,
+            verbose=False,
+            log=False)
+        self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(const)
+        self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(eq_ntaps, eq_mod, eq_gain, sps)
+        self.channels_channel_model_0 = channels.channel_model(
+            noise_voltage=noise_volt,
+            frequency_offset=freq_offset,
+            epsilon=time_offset,
+            taps=chn_taps,
+            noise_seed=0,
+            block_tags=False)
+        self.blocks_unpack_k_bits_bb_0 = blocks.unpack_k_bits_bb(2)
+        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
+        self.blocks_null_sink_0 = blocks.null_sink(gr.sizeof_float*1)
+        self.blocks_char_to_float_0 = blocks.char_to_float(1, 1)
+        self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 256, 1000))), True)
+
+
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.analog_random_source_x_0, 0), (self.digital_constellation_modulator_0, 0))
+        self.connect((self.blocks_char_to_float_0, 0), (self.blocks_null_sink_0, 0))
+        self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
+        self.connect((self.blocks_unpack_k_bits_bb_0, 0), (self.blocks_char_to_float_0, 0))
+        self.connect((self.channels_channel_model_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
+        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_costas_loop_cc_0, 0))
+        self.connect((self.digital_constellation_decoder_cb_0, 0), (self.digital_diff_decoder_bb_0, 0))
+        self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
+        self.connect((self.digital_costas_loop_cc_0, 0), (self.digital_constellation_decoder_cb_0, 0))
+        self.connect((self.digital_diff_decoder_bb_0, 0), (self.digital_map_bb_0, 0))
+        self.connect((self.digital_map_bb_0, 0), (self.blocks_unpack_k_bits_bb_0, 0))
+        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0))
+
+
+    def get_sps(self):
+        return self.sps
+
+    def set_sps(self, sps):
+        self.sps = sps
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+
+    def get_nfilts(self):
+        return self.nfilts
+
+    def set_nfilts(self, nfilts):
+        self.nfilts = nfilts
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+
+    def get_excess_bw(self):
+        return self.excess_bw
+
+    def set_excess_bw(self, excess_bw):
+        self.excess_bw = excess_bw
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+
+    def get_timing_loop_bw(self):
+        return self.timing_loop_bw
+
+    def set_timing_loop_bw(self, timing_loop_bw):
+        self.timing_loop_bw = timing_loop_bw
+        self.digital_pfb_clock_sync_xxx_0.set_loop_bandwidth(self.timing_loop_bw)
+
+    def get_time_offset(self):
+        return self.time_offset
+
+    def set_time_offset(self, time_offset):
+        self.time_offset = time_offset
+        self.channels_channel_model_0.set_timing_offset(self.time_offset)
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.blocks_throttle_0.set_sample_rate(self.samp_rate)
+
+    def get_rrc_taps(self):
+        return self.rrc_taps
+
+    def set_rrc_taps(self, rrc_taps):
+        self.rrc_taps = rrc_taps
+        self.digital_pfb_clock_sync_xxx_0.update_taps(self.rrc_taps)
+
+    def get_qam_const(self):
+        return self.qam_const
+
+    def set_qam_const(self, qam_const):
+        self.qam_const = qam_const
+
+    def get_phase_bw(self):
+        return self.phase_bw
+
+    def set_phase_bw(self, phase_bw):
+        self.phase_bw = phase_bw
+        self.digital_costas_loop_cc_0.set_loop_bandwidth(self.phase_bw)
+
+    def get_noise_volt(self):
+        return self.noise_volt
+
+    def set_noise_volt(self, noise_volt):
+        self.noise_volt = noise_volt
+        self.channels_channel_model_0.set_noise_voltage(self.noise_volt)
+
+    def get_freq_offset(self):
+        return self.freq_offset
+
+    def set_freq_offset(self, freq_offset):
+        self.freq_offset = freq_offset
+        self.channels_channel_model_0.set_frequency_offset(self.freq_offset)
+
+    def get_eq_ntaps(self):
+        return self.eq_ntaps
+
+    def set_eq_ntaps(self, eq_ntaps):
+        self.eq_ntaps = eq_ntaps
+
+    def get_eq_mod(self):
+        return self.eq_mod
+
+    def set_eq_mod(self, eq_mod):
+        self.eq_mod = eq_mod
+        self.digital_cma_equalizer_cc_0.set_modulus(self.eq_mod)
+
+    def get_eq_gain(self):
+        return self.eq_gain
+
+    def set_eq_gain(self, eq_gain):
+        self.eq_gain = eq_gain
+        self.digital_cma_equalizer_cc_0.set_gain(self.eq_gain)
+
+    def get_const(self):
+        return self.const
+
+    def set_const(self, const):
+        self.const = const
+
+    def get_chn_taps(self):
+        return self.chn_taps
+
+    def set_chn_taps(self, chn_taps):
+        self.chn_taps = chn_taps
+        self.channels_channel_model_0.set_taps(self.chn_taps)
+
+
+
+
+
+def main(top_block_cls=qam_nogui, options=None):
+    if gr.enable_realtime_scheduling() != gr.RT_OK:
+        print("Error: failed to enable real-time scheduling.")
+    tb = top_block_cls()
+
+    def sig_handler(sig=None, frame=None):
+        tb.stop()
+        tb.wait()
+
+        sys.exit(0)
+
+    signal.signal(signal.SIGINT, sig_handler)
+    signal.signal(signal.SIGTERM, sig_handler)
+
+    tb.start()
+
+    try:
+        input('Press Enter to quit: ')
+    except EOFError:
+        pass
+    tb.stop()
+    tb.wait()
+
+
+if __name__ == '__main__':
+    main()
diff --git a/simulation/QPSK/qpks.py b/simulation/QPSK/qpks.py
deleted file mode 100755
index 98a982f..0000000
--- a/simulation/QPSK/qpks.py
+++ /dev/null
@@ -1,644 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-#
-# SPDX-License-Identifier: GPL-3.0
-#
-# GNU Radio Python Flow Graph
-# Title: QPSK
-# Author: Pross Naoki, Halter Sara Cinzia
-# GNU Radio version: 3.8.2.0
-
-from distutils.version import StrictVersion
-
-if __name__ == '__main__':
-    import ctypes
-    import sys
-    if sys.platform.startswith('linux'):
-        try:
-            x11 = ctypes.cdll.LoadLibrary('libX11.so')
-            x11.XInitThreads()
-        except:
-            print("Warning: failed to XInitThreads()")
-
-from PyQt5 import Qt
-from gnuradio import qtgui
-from gnuradio.filter import firdes
-import sip
-from gnuradio import blocks
-import numpy
-from gnuradio import channels
-from gnuradio import digital
-from gnuradio import gr
-import sys
-import signal
-from argparse import ArgumentParser
-from gnuradio.eng_arg import eng_float, intx
-from gnuradio import eng_notation
-from gnuradio.qtgui import Range, RangeWidget
-
-from gnuradio import qtgui
-
-class qpks(gr.top_block, Qt.QWidget):
-
-    def __init__(self):
-        gr.top_block.__init__(self, "QPSK")
-        Qt.QWidget.__init__(self)
-        self.setWindowTitle("QPSK")
-        qtgui.util.check_set_qss()
-        try:
-            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
-        except:
-            pass
-        self.top_scroll_layout = Qt.QVBoxLayout()
-        self.setLayout(self.top_scroll_layout)
-        self.top_scroll = Qt.QScrollArea()
-        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
-        self.top_scroll_layout.addWidget(self.top_scroll)
-        self.top_scroll.setWidgetResizable(True)
-        self.top_widget = Qt.QWidget()
-        self.top_scroll.setWidget(self.top_widget)
-        self.top_layout = Qt.QVBoxLayout(self.top_widget)
-        self.top_grid_layout = Qt.QGridLayout()
-        self.top_layout.addLayout(self.top_grid_layout)
-
-        self.settings = Qt.QSettings("GNU Radio", "qpks")
-
-        try:
-            if StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
-                self.restoreGeometry(self.settings.value("geometry").toByteArray())
-            else:
-                self.restoreGeometry(self.settings.value("geometry"))
-        except:
-            pass
-
-        ##################################################
-        # Variables
-        ##################################################
-        self.sps = sps = 4
-        self.nfilts = nfilts = 32
-        self.excess_bw = excess_bw = 350e-3
-        self.timing_loop_bw = timing_loop_bw = 2 * 3.141592653589793 / 100
-        self.time_offset = time_offset = 1.0
-        self.samp_rate = samp_rate = 32000
-        self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
-        self.qpsk_const = qpsk_const = digital.constellation_rect([0.707+1j, -0.707+0.707j, -0.707-0.707j, 0.707-0.707j], [0, 1, 3, 2],
-        4, 2, 2, 1, 1).base()
-        self.phase_bw = phase_bw = 2 * 3.141592653589793 / 100
-        self.noise_volt = noise_volt = 0.0001
-        self.freq_offset = freq_offset = 0
-        self.eq_ntaps = eq_ntaps = 15
-        self.eq_mod = eq_mod = 1
-        self.eq_gain = eq_gain = .01
-        self.chn_taps = chn_taps = [1.0 + 0.0j, ]
-
-        ##################################################
-        # Blocks
-        ##################################################
-        self.params = Qt.QTabWidget()
-        self.params_widget_0 = Qt.QWidget()
-        self.params_layout_0 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.params_widget_0)
-        self.params_grid_layout_0 = Qt.QGridLayout()
-        self.params_layout_0.addLayout(self.params_grid_layout_0)
-        self.params.addTab(self.params_widget_0, 'Channel')
-        self.params_widget_1 = Qt.QWidget()
-        self.params_layout_1 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.params_widget_1)
-        self.params_grid_layout_1 = Qt.QGridLayout()
-        self.params_layout_1.addLayout(self.params_grid_layout_1)
-        self.params.addTab(self.params_widget_1, 'Receiver')
-        self.top_grid_layout.addWidget(self.params)
-        self._timing_loop_bw_range = Range(0, 200e-3, 10e-3, 2 * 3.141592653589793 / 100, 200)
-        self._timing_loop_bw_win = RangeWidget(self._timing_loop_bw_range, self.set_timing_loop_bw, 'Time Bandwidth', "counter_slider", float)
-        self.params_grid_layout_0.addWidget(self._timing_loop_bw_win, 1, 1, 1, 1)
-        for r in range(1, 2):
-            self.params_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.params_grid_layout_0.setColumnStretch(c, 1)
-        self._time_offset_range = Range(0.999, 1.001, 0.0001, 1.0, 200)
-        self._time_offset_win = RangeWidget(self._time_offset_range, self.set_time_offset, 'Timing Offset', "counter_slider", float)
-        self.params_grid_layout_0.addWidget(self._time_offset_win, 0, 1, 1, 1)
-        for r in range(0, 1):
-            self.params_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.params_grid_layout_0.setColumnStretch(c, 1)
-        self.plots = Qt.QTabWidget()
-        self.plots_widget_0 = Qt.QWidget()
-        self.plots_layout_0 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_0)
-        self.plots_grid_layout_0 = Qt.QGridLayout()
-        self.plots_layout_0.addLayout(self.plots_grid_layout_0)
-        self.plots.addTab(self.plots_widget_0, 'Constellations')
-        self.plots_widget_1 = Qt.QWidget()
-        self.plots_layout_1 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_1)
-        self.plots_grid_layout_1 = Qt.QGridLayout()
-        self.plots_layout_1.addLayout(self.plots_grid_layout_1)
-        self.plots.addTab(self.plots_widget_1, 'Frequency')
-        self.plots_widget_2 = Qt.QWidget()
-        self.plots_layout_2 = Qt.QBoxLayout(Qt.QBoxLayout.TopToBottom, self.plots_widget_2)
-        self.plots_grid_layout_2 = Qt.QGridLayout()
-        self.plots_layout_2.addLayout(self.plots_grid_layout_2)
-        self.plots.addTab(self.plots_widget_2, 'Time')
-        self.top_grid_layout.addWidget(self.plots)
-        self._phase_bw_range = Range(0, 1, .01, 2 * 3.141592653589793 / 100, 200)
-        self._phase_bw_win = RangeWidget(self._phase_bw_range, self.set_phase_bw, 'Phase Bandwidth', "counter_slider", float)
-        self.params_grid_layout_1.addWidget(self._phase_bw_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.params_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_1.setColumnStretch(c, 1)
-        self._noise_volt_range = Range(0, 1, 0.01, 0.0001, 200)
-        self._noise_volt_win = RangeWidget(self._noise_volt_range, self.set_noise_volt, 'Noise Voltage', "counter_slider", float)
-        self.params_grid_layout_0.addWidget(self._noise_volt_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.params_grid_layout_0.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_0.setColumnStretch(c, 1)
-        self._freq_offset_range = Range(-100e-3, 100e-3, 1e-3, 0, 200)
-        self._freq_offset_win = RangeWidget(self._freq_offset_range, self.set_freq_offset, 'Frequency Offset', "counter_slider", float)
-        self.params_grid_layout_0.addWidget(self._freq_offset_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.params_grid_layout_0.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_0.setColumnStretch(c, 1)
-        self._eq_gain_range = Range(0, .1, .001, .01, 200)
-        self._eq_gain_win = RangeWidget(self._eq_gain_range, self.set_eq_gain, 'Equalizer Rate', "counter_slider", float)
-        self.params_grid_layout_1.addWidget(self._eq_gain_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.params_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.params_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
-            1024, #size
-            samp_rate, #samp_rate
-            "Decoded", #name
-            2 #number of inputs
-        )
-        self.qtgui_time_sink_x_0.set_update_time(0.10)
-        self.qtgui_time_sink_x_0.set_y_axis(-1, 1)
-
-        self.qtgui_time_sink_x_0.set_y_label('Amplitude', "")
-
-        self.qtgui_time_sink_x_0.enable_tags(True)
-        self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_time_sink_x_0.enable_autoscale(False)
-        self.qtgui_time_sink_x_0.enable_grid(False)
-        self.qtgui_time_sink_x_0.enable_axis_labels(True)
-        self.qtgui_time_sink_x_0.enable_control_panel(False)
-        self.qtgui_time_sink_x_0.enable_stem_plot(False)
-
-
-        labels = ['Received', 'Sent', 'Signal 3', 'Signal 4', 'Signal 5',
-            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ['blue', 'red', 'green', 'black', 'cyan',
-            'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-        styles = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        markers = [-1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1]
-
-
-        for i in range(2):
-            if len(labels[i]) == 0:
-                self.qtgui_time_sink_x_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
-            self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
-            self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_2.addWidget(self._qtgui_time_sink_x_0_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_2.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_2.setColumnStretch(c, 1)
-        self.qtgui_freq_sink_x_0 = qtgui.freq_sink_c(
-            1024, #size
-            firdes.WIN_BLACKMAN_hARRIS, #wintype
-            0, #fc
-            samp_rate, #bw
-            "Channel", #name
-            1
-        )
-        self.qtgui_freq_sink_x_0.set_update_time(0.10)
-        self.qtgui_freq_sink_x_0.set_y_axis(-140, 10)
-        self.qtgui_freq_sink_x_0.set_y_label('Relative Gain', 'dB')
-        self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
-        self.qtgui_freq_sink_x_0.enable_autoscale(False)
-        self.qtgui_freq_sink_x_0.enable_grid(False)
-        self.qtgui_freq_sink_x_0.set_fft_average(1.0)
-        self.qtgui_freq_sink_x_0.enable_axis_labels(True)
-        self.qtgui_freq_sink_x_0.enable_control_panel(False)
-
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "green", "black", "cyan",
-            "magenta", "yellow", "dark red", "dark green", "dark blue"]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_1.addWidget(self._qtgui_freq_sink_x_0_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_1.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_1.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_2 = qtgui.const_sink_c(
-            1024, #size
-            "Locked", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_2.set_update_time(0.10)
-        self.qtgui_const_sink_x_2.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_2.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_2.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_2.enable_autoscale(False)
-        self.qtgui_const_sink_x_2.enable_grid(False)
-        self.qtgui_const_sink_x_2.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_2.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_2.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_2.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_2.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_2.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_2.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_2.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_2_win = sip.wrapinstance(self.qtgui_const_sink_x_2.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_2_win, 1, 1, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_1 = qtgui.const_sink_c(
-            1024, #size
-            "Equalized", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_1.set_update_time(0.10)
-        self.qtgui_const_sink_x_1.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_1.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_1.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_1.enable_autoscale(False)
-        self.qtgui_const_sink_x_1.enable_grid(False)
-        self.qtgui_const_sink_x_1.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_1.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_1.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_1.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_1.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_1.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_1.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_1.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_1_win = sip.wrapinstance(self.qtgui_const_sink_x_1.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_1_win, 1, 0, 1, 1)
-        for r in range(1, 2):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_0_0 = qtgui.const_sink_c(
-            2048, #size
-            "Synchronized", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_0_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0_0.enable_autoscale(False)
-        self.qtgui_const_sink_x_0_0.enable_grid(False)
-        self.qtgui_const_sink_x_0_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_0_0_win, 0, 1, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(1, 2):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.qtgui_const_sink_x_0 = qtgui.const_sink_c(
-            2048, #size
-            "Channel", #name
-            1 #number of inputs
-        )
-        self.qtgui_const_sink_x_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0.enable_autoscale(False)
-        self.qtgui_const_sink_x_0.enable_grid(False)
-        self.qtgui_const_sink_x_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(1):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.plots_grid_layout_0.addWidget(self._qtgui_const_sink_x_0_win, 0, 0, 1, 1)
-        for r in range(0, 1):
-            self.plots_grid_layout_0.setRowStretch(r, 1)
-        for c in range(0, 1):
-            self.plots_grid_layout_0.setColumnStretch(c, 1)
-        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps * 1.001, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, 2)
-        self.digital_map_bb_0 = digital.map_bb([0, 1, 3, 2])
-        self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(4)
-        self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, 4, False)
-        self.digital_constellation_modulator_0 = digital.generic_mod(
-            constellation=qpsk_const,
-            differential=True,
-            samples_per_symbol=sps,
-            pre_diff_code=True,
-            excess_bw=excess_bw,
-            verbose=False,
-            log=False)
-        self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(qpsk_const)
-        self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(eq_ntaps, eq_mod, eq_gain, 2)
-        self.channels_channel_model_0 = channels.channel_model(
-            noise_voltage=noise_volt,
-            frequency_offset=freq_offset,
-            epsilon=time_offset,
-            taps=chn_taps,
-            noise_seed=0,
-            block_tags=False)
-        self.blocks_unpack_k_bits_bb_0_0 = blocks.unpack_k_bits_bb(2)
-        self.blocks_unpack_k_bits_bb_0 = blocks.unpack_k_bits_bb(2)
-        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
-        self.blocks_delay_0 = blocks.delay(gr.sizeof_float*1, 50)
-        self.blocks_char_to_float_0_0 = blocks.char_to_float(1, 1)
-        self.blocks_char_to_float_0 = blocks.char_to_float(1, 1)
-        self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 256, 1000))), True)
-
-
-
-        ##################################################
-        # Connections
-        ##################################################
-        self.connect((self.analog_random_source_x_0, 0), (self.blocks_unpack_k_bits_bb_0_0, 0))
-        self.connect((self.analog_random_source_x_0, 0), (self.digital_constellation_modulator_0, 0))
-        self.connect((self.blocks_char_to_float_0, 0), (self.qtgui_time_sink_x_0, 0))
-        self.connect((self.blocks_char_to_float_0_0, 0), (self.blocks_delay_0, 0))
-        self.connect((self.blocks_delay_0, 0), (self.qtgui_time_sink_x_0, 1))
-        self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
-        self.connect((self.blocks_unpack_k_bits_bb_0, 0), (self.blocks_char_to_float_0, 0))
-        self.connect((self.blocks_unpack_k_bits_bb_0_0, 0), (self.blocks_char_to_float_0_0, 0))
-        self.connect((self.channels_channel_model_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
-        self.connect((self.channels_channel_model_0, 0), (self.qtgui_const_sink_x_0, 0))
-        self.connect((self.channels_channel_model_0, 0), (self.qtgui_freq_sink_x_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_costas_loop_cc_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.qtgui_const_sink_x_1, 0))
-        self.connect((self.digital_constellation_decoder_cb_0, 0), (self.digital_diff_decoder_bb_0, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.digital_constellation_decoder_cb_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_const_sink_x_2, 0))
-        self.connect((self.digital_diff_decoder_bb_0, 0), (self.digital_map_bb_0, 0))
-        self.connect((self.digital_map_bb_0, 0), (self.blocks_unpack_k_bits_bb_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_const_sink_x_0_0, 0))
-
-
-    def closeEvent(self, event):
-        self.settings = Qt.QSettings("GNU Radio", "qpks")
-        self.settings.setValue("geometry", self.saveGeometry())
-        event.accept()
-
-    def get_sps(self):
-        return self.sps
-
-    def set_sps(self, sps):
-        self.sps = sps
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-
-    def get_nfilts(self):
-        return self.nfilts
-
-    def set_nfilts(self, nfilts):
-        self.nfilts = nfilts
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-
-    def get_excess_bw(self):
-        return self.excess_bw
-
-    def set_excess_bw(self, excess_bw):
-        self.excess_bw = excess_bw
-        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-
-    def get_timing_loop_bw(self):
-        return self.timing_loop_bw
-
-    def set_timing_loop_bw(self, timing_loop_bw):
-        self.timing_loop_bw = timing_loop_bw
-        self.digital_pfb_clock_sync_xxx_0.set_loop_bandwidth(self.timing_loop_bw)
-
-    def get_time_offset(self):
-        return self.time_offset
-
-    def set_time_offset(self, time_offset):
-        self.time_offset = time_offset
-        self.channels_channel_model_0.set_timing_offset(self.time_offset)
-
-    def get_samp_rate(self):
-        return self.samp_rate
-
-    def set_samp_rate(self, samp_rate):
-        self.samp_rate = samp_rate
-        self.blocks_throttle_0.set_sample_rate(self.samp_rate)
-        self.qtgui_freq_sink_x_0.set_frequency_range(0, self.samp_rate)
-        self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate)
-
-    def get_rrc_taps(self):
-        return self.rrc_taps
-
-    def set_rrc_taps(self, rrc_taps):
-        self.rrc_taps = rrc_taps
-        self.digital_pfb_clock_sync_xxx_0.update_taps(self.rrc_taps)
-
-    def get_qpsk_const(self):
-        return self.qpsk_const
-
-    def set_qpsk_const(self, qpsk_const):
-        self.qpsk_const = qpsk_const
-
-    def get_phase_bw(self):
-        return self.phase_bw
-
-    def set_phase_bw(self, phase_bw):
-        self.phase_bw = phase_bw
-        self.digital_costas_loop_cc_0.set_loop_bandwidth(self.phase_bw)
-
-    def get_noise_volt(self):
-        return self.noise_volt
-
-    def set_noise_volt(self, noise_volt):
-        self.noise_volt = noise_volt
-        self.channels_channel_model_0.set_noise_voltage(self.noise_volt)
-
-    def get_freq_offset(self):
-        return self.freq_offset
-
-    def set_freq_offset(self, freq_offset):
-        self.freq_offset = freq_offset
-        self.channels_channel_model_0.set_frequency_offset(self.freq_offset)
-
-    def get_eq_ntaps(self):
-        return self.eq_ntaps
-
-    def set_eq_ntaps(self, eq_ntaps):
-        self.eq_ntaps = eq_ntaps
-
-    def get_eq_mod(self):
-        return self.eq_mod
-
-    def set_eq_mod(self, eq_mod):
-        self.eq_mod = eq_mod
-        self.digital_cma_equalizer_cc_0.set_modulus(self.eq_mod)
-
-    def get_eq_gain(self):
-        return self.eq_gain
-
-    def set_eq_gain(self, eq_gain):
-        self.eq_gain = eq_gain
-        self.digital_cma_equalizer_cc_0.set_gain(self.eq_gain)
-
-    def get_chn_taps(self):
-        return self.chn_taps
-
-    def set_chn_taps(self, chn_taps):
-        self.chn_taps = chn_taps
-        self.channels_channel_model_0.set_taps(self.chn_taps)
-
-
-
-
-
-def main(top_block_cls=qpks, options=None):
-    if gr.enable_realtime_scheduling() != gr.RT_OK:
-        print("Error: failed to enable real-time scheduling.")
-
-    if StrictVersion("4.5.0") <= StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
-        style = gr.prefs().get_string('qtgui', 'style', 'raster')
-        Qt.QApplication.setGraphicsSystem(style)
-    qapp = Qt.QApplication(sys.argv)
-
-    tb = top_block_cls()
-
-    tb.start()
-
-    tb.show()
-
-    def sig_handler(sig=None, frame=None):
-        Qt.QApplication.quit()
-
-    signal.signal(signal.SIGINT, sig_handler)
-    signal.signal(signal.SIGTERM, sig_handler)
-
-    timer = Qt.QTimer()
-    timer.start(500)
-    timer.timeout.connect(lambda: None)
-
-    def quitting():
-        tb.stop()
-        tb.wait()
-
-    qapp.aboutToQuit.connect(quitting)
-    qapp.exec_()
-
-if __name__ == '__main__':
-    main()
diff --git a/src/sketch.py b/src/gui.py
index 5f170b2..58e36a3 100755
--- a/src/sketch.py
+++ b/src/gui.py
@@ -36,7 +36,7 @@ create_viewport()
 setup_dearpygui()
 
 # Show demo for dev
-# show_demo()
+show_demo()
 
 #================================================
 # Custom GNURadio blocks
@@ -122,25 +122,40 @@ sim.connect((sim.digital_costas_loop_cc_0, 0), (locked_time_plot, 0))
 # Settings Window
 
 with window(label="Settings", width=200, height=400, pos=(25, 450), tag="sim_win"):
-    add_button(label="Toggle Fullscreen", callback= toggle_viewport_fullscreen)
+    with child_window(autosize_x=True, height=100):
+        add_button(label="Toggle Fullscreen", callback= toggle_viewport_fullscreen)
 
-    add_text("Simulation running:")
-    add_text("false", tag="sim_running_lbl")
+    with child_window(autosize_x=True):
+        with group(horizontal=True):
+            add_text("Simulation running:")
+            add_text("false", tag="sim_running_lbl")
 
-    with group(horizontal=True):
-        def on_sim_start_btn_clicked():
-            sim.start()
-            sim_runnig = True
-            logger.debug("Started simulation")
+        with group(tag="sim_grp", horizontal=True):
+            def on_sim_start_btn_clicked():
+                global sim_running
 
-        def on_sim_stop_btn_clicked():
-            sim.stop()
-            sim.wait()
-            sim_running = False
-            logger.debug("Stopped simulation")
+                if sim_running:
+                    logger.error("Simulation is already running")
+                    return
 
-        add_button(label="Start", tag="sim_start_btn", callback=on_sim_start_btn_clicked)
-        add_button(label="Stop", tag="sim_stop_btn", callback=on_sim_stop_btn_clicked)
+                sim.start()
+                sim_running = True
+                logger.debug("Started simulation")
+
+            def on_sim_stop_btn_clicked():
+                global sim_running
+
+                if not sim_running:
+                    logger.error("Simulation not running")
+                    return
+
+                sim.stop()
+                sim.wait()
+                sim_running = False
+                logger.debug("Stopped simulation")
+
+            add_button(label="Start", tag="sim_start_btn", callback=on_sim_start_btn_clicked)
+            add_button(label="Stop", tag="sim_stop_btn", callback=on_sim_stop_btn_clicked)
 
 #================================================
 # Flow Graph Window
@@ -196,8 +211,3 @@ start_dearpygui()
 
 # clean up gui
 destroy_context()
-
-# Stop GNURadio 
-if sim_running:
-    sim.stop()
-    sim.wait()
diff --git a/src/qam.py b/src/qam.py
new file mode 120000
index 0000000..a59366b
--- /dev/null
+++ b/src/qam.py
@@ -0,0 +1 @@
+../simulation/QAM/qam_nogui.py
\ No newline at end of file
diff --git a/src/Test_Plots/test.py b/tests/dearpygui/test.py
index 3fb0d51..3fb0d51 100644
--- a/src/Test_Plots/test.py
+++ b/tests/dearpygui/test.py
diff --git a/src/Test_Plots/test10.py b/tests/dearpygui/test10.py
index d478d9a..d478d9a 100644
--- a/src/Test_Plots/test10.py
+++ b/tests/dearpygui/test10.py
diff --git a/src/Test_Plots/test1_updating_series_data.py b/tests/dearpygui/test1_updating_series_data.py
index 1371008..1371008 100644
--- a/src/Test_Plots/test1_updating_series_data.py
+++ b/tests/dearpygui/test1_updating_series_data.py
diff --git a/src/Test_Plots/test2_axis_limis.py b/tests/dearpygui/test2_axis_limis.py
index bdfeda1..bdfeda1 100644
--- a/src/Test_Plots/test2_axis_limis.py
+++ b/tests/dearpygui/test2_axis_limis.py
diff --git a/src/Test_Plots/test3_custom_axis_labels.py b/tests/dearpygui/test3_custom_axis_labels.py
index be6b80b..be6b80b 100644
--- a/src/Test_Plots/test3_custom_axis_labels.py
+++ b/tests/dearpygui/test3_custom_axis_labels.py
diff --git a/src/Test_Plots/test4_multiple_y_axes.py b/tests/dearpygui/test4_multiple_y_axes.py
index ebaac7e..ebaac7e 100644
--- a/src/Test_Plots/test4_multiple_y_axes.py
+++ b/tests/dearpygui/test4_multiple_y_axes.py
diff --git a/src/Test_Plots/test5_annotations.py b/tests/dearpygui/test5_annotations.py
index 9deff6b..9deff6b 100644
--- a/src/Test_Plots/test5_annotations.py
+++ b/tests/dearpygui/test5_annotations.py
diff --git a/src/Test_Plots/test6_drag_points_and_lines.py b/tests/dearpygui/test6_drag_points_and_lines.py
index c6d8862..c6d8862 100644
--- a/src/Test_Plots/test6_drag_points_and_lines.py
+++ b/tests/dearpygui/test6_drag_points_and_lines.py
diff --git a/src/Test_Plots/test7_querying.py b/tests/dearpygui/test7_querying.py
index 06f3ceb..06f3ceb 100644
--- a/src/Test_Plots/test7_querying.py
+++ b/tests/dearpygui/test7_querying.py
diff --git a/src/Test_Plots/test8_custom_context_menus.py b/tests/dearpygui/test8_custom_context_menus.py
index b459d15..b459d15 100644
--- a/src/Test_Plots/test8_custom_context_menus.py
+++ b/tests/dearpygui/test8_custom_context_menus.py
diff --git a/src/Test_Plots/test9_colors_and_styles.py b/tests/dearpygui/test9_colors_and_styles.py
index 2f1c7ef..2f1c7ef 100644
--- a/src/Test_Plots/test9_colors_and_styles.py
+++ b/tests/dearpygui/test9_colors_and_styles.py
diff --git a/tests/zmq/lena512color.tiff b/tests/zmq/lena512color.tiff
new file mode 100644
index 0000000..ffe5c83
--- /dev/null
+++ b/tests/zmq/lena512color.tiff
diff --git a/tests/zmq/server.py b/tests/zmq/server.py
new file mode 100644
index 0000000..be4bede
--- /dev/null
+++ b/tests/zmq/server.py
@@ -0,0 +1,4 @@
+import zmq
+import pmt
+
+import numpy as np
diff --git a/tests/zmq/zmqtest.grc b/tests/zmq/zmqtest.grc
new file mode 100644
index 0000000..ad1729d
--- /dev/null
+++ b/tests/zmq/zmqtest.grc
@@ -0,0 +1,112 @@
+options:
+  parameters:
+    author: Naoki Pross
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: no_gui
+    hier_block_src_path: '.:'
+    id: zmqtest
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: '1'
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: prompt
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: ZMQ test
+    window_size: ''
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [8, 8]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: '32000'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [184, 12]
+    rotation: 0
+    state: enabled
+- name: blocks_throttle_0
+  id: blocks_throttle
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    ignoretag: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_second: samp_rate
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [440, 324.0]
+    rotation: 0
+    state: true
+- name: zeromq_rep_sink_0
+  id: zeromq_rep_sink
+  parameters:
+    address: ''
+    affinity: ''
+    alias: ''
+    comment: ''
+    hwm: '-1'
+    pass_tags: 'False'
+    timeout: '100'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [664, 308.0]
+    rotation: 0
+    state: true
+- name: zeromq_req_source_0
+  id: zeromq_req_source
+  parameters:
+    address: ''
+    affinity: ''
+    alias: ''
+    comment: ''
+    hwm: '-1'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    pass_tags: 'False'
+    timeout: '100'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [216, 308.0]
+    rotation: 0
+    state: true
+
+connections:
+- [blocks_throttle_0, '0', zeromq_rep_sink_0, '0']
+- [zeromq_req_source_0, '0', blocks_throttle_0, '0']
+
+metadata:
+  file_format: 1
diff --git a/tests/zmq/zmqtest.py b/tests/zmq/zmqtest.py
new file mode 100755
index 0000000..a046c13
--- /dev/null
+++ b/tests/zmq/zmqtest.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+#
+# SPDX-License-Identifier: GPL-3.0
+#
+# GNU Radio Python Flow Graph
+# Title: ZMQ test
+# Author: Naoki Pross
+# GNU Radio version: 3.8.2.0
+
+from gnuradio import blocks
+from gnuradio import gr
+from gnuradio.filter import firdes
+import sys
+import signal
+from argparse import ArgumentParser
+from gnuradio.eng_arg import eng_float, intx
+from gnuradio import eng_notation
+from gnuradio import zeromq
+
+
+class zmqtest(gr.top_block):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "ZMQ test")
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.samp_rate = samp_rate = 32000
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.zeromq_req_source_0 = zeromq.req_source(gr.sizeof_gr_complex, 1, '', 100, False, -1)
+        self.zeromq_rep_sink_0 = zeromq.rep_sink(gr.sizeof_gr_complex, 1, '', 100, False, -1)
+        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
+
+
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.blocks_throttle_0, 0), (self.zeromq_rep_sink_0, 0))
+        self.connect((self.zeromq_req_source_0, 0), (self.blocks_throttle_0, 0))
+
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.blocks_throttle_0.set_sample_rate(self.samp_rate)
+
+
+
+
+
+def main(top_block_cls=zmqtest, options=None):
+    if gr.enable_realtime_scheduling() != gr.RT_OK:
+        print("Error: failed to enable real-time scheduling.")
+    tb = top_block_cls()
+
+    def sig_handler(sig=None, frame=None):
+        tb.stop()
+        tb.wait()
+
+        sys.exit(0)
+
+    signal.signal(signal.SIGINT, sig_handler)
+    signal.signal(signal.SIGTERM, sig_handler)
+
+    tb.start()
+
+    try:
+        input('Press Enter to quit: ')
+    except EOFError:
+        pass
+    tb.stop()
+    tb.wait()
+
+
+if __name__ == '__main__':
+    main()